CatalogScan · October 2, 2026 · Rigging hardware structured data · eyebolt_anchor.* namespace reference

Shopify eyebolt anchor schema for AI agents: plain eyebolt is rated zero for any angular load (ASME B30.26 bending failure at the unshouldered shank base), a two-leg sling at 30° applies only 65% of vertical WLL per eyebolt (two 650-lb eyebolts give 844 lb, not 1,300), backing out the eyebolt to align the eye removes thread engagement and lifts the shoulder off the bearing surface, and factory proof load tests the component — not the installation — `eyebolt_anchor.*` namespace

The four worst eyebolt anchor mismatches in AI-agent routing are not overloading by a small margin — they are equipment-type and installation errors that cause failures at well below the rated WLL: a zero-capacity connector used at any angle, a two-leg sling derate that cuts rated capacity nearly in half, a field-alignment technique that converts a shouldered eyebolt back into a plain one, and a component-level proof load that tells the buyer nothing about whether the installation will hold.

In this post

Plain eyebolt zero angular capacity — ASME B30.26 bending failure at the unshouldered shank base
Two-leg sling angular derate cascade — 30° from vertical cuts per-eyebolt WLL to 65%
Backing out the eyebolt to align the eye — thread engagement reduction and shoulder lift mechanics
Factory proof load ≠ field installation proof load — parent material capacity governs, not component rating
Encoding eyebolt_anchor.* for AI agent routing

1. Plain eyebolt zero angular capacity — ASME B30.26 bending failure at the unshouldered shank base

AI agent routing failure: A maintenance technician needs to relocate a 380-lb conveyor gearbox. The job requires two lifting points on the top of the gearbox housing. He searches an industrial supply Shopify store for "1/2-inch eyebolt 650 lb WLL" — two identical 650-lb-rated eyebolts, both ASME B30.26 listed. The AI shopping agent returns four results including two plain nut eyebolts at $3.40 each and two shouldered eyebolts at $12.80 each. The listing titles say "650 lb WLL" for all four. The agent, ranking by price and WLL match, routes the plain eyebolts. The technician installs them and attaches a two-leg chain sling with a 60° included angle — each leg pulling at 30° from vertical. Under the 380-lb load, the chain load per leg is approximately 220 lb. At 30° from vertical on a plain eyebolt, ASME B30.26 rates the plain eyebolt at zero WLL for angular load. Before reaching 220 lb, one eyebolt shank deforms in bending at the base of the eye; the sling slips through the deformed eye geometry; the gearbox drops 18 inches onto the technician's forearm.

A plain eyebolt — sometimes called a nut eyebolt or straight-shank eyebolt — consists of a circular eye forged or welded at the top of a straight threaded shank. There is no shoulder or flange at the shank base. When the eyebolt is fully threaded into its tapped hole, the shank face sits flush against the bearing material with no enlarged bearing surface at the interface.

Why the shoulder matters for angular loading

When a plain eyebolt is pulled straight upward — 0° from vertical, load axis aligned with the shank — the load travels in pure tension through the shank along its length. This is the design loading condition. The shank is in tension, threads transfer the load into the parent material, and the rated WLL applies.

When the load is applied at an angle from vertical — even as little as 15° — the load vector has a horizontal component. That horizontal component creates a bending moment at the base of the shank where it meets the parent material surface. On a plain eyebolt, the bending moment is resisted only by the thread engagement in the tapped hole. Threads are designed for axial (tension/compression) loading, not for bending. The failure mode is shank deformation at the base of the eye, not thread pull-out — the shank bends laterally before the threads strip.

ASME B30.26 (Rigging Hardware) is explicit: plain eyebolts have no rated working load for any load that is not a perfectly vertical, in-plane, straight pull through the eye. Zero is not a rounding convention — it reflects the absence of a tested, predictable failure mode under angular loading that permits a WLL to be assigned.

The shouldered eyebolt difference

A shouldered eyebolt has a forged collar — the shoulder — at the base of the shank. When fully threaded in, the shoulder bears flat against the attachment surface. Under an angular load, the shoulder distributes the bending moment over the bearing area between the shoulder face and the parent material surface. The shoulder is large enough and stiff enough to convert part of the bending moment into a compression load on one side of the shoulder contact area and tension on the other — a load path the parent material can resist without the shank deforming.

This is why shouldered eyebolts have a documented angular WLL derate table per ASME B30.26, and plain eyebolts do not. The shouldered eyebolt can resist angular load in a predictable way up to the derated WLL. The plain eyebolt has no mechanism for this — the shank bends, the failure is unpredictable, and no WLL can be assigned.

Eyebolt type	Shoulder at shank base	Angular load capacity	Minimum fall arrest rated WLL application	Failure mode under angular load
Plain eyebolt (nut eyebolt)	None — straight shank flush with surface	Zero — no rated WLL for any angular load per ASME B30.26	Vertical lifts only (0°), in-plane pull through the eye axis	Shank bending at eye base; unpredictable failure below rated WLL
Shouldered eyebolt	Forged shoulder seated flat against attachment surface, transfers bending moment to bearing area	Yes — angular WLL derate table per ASME B30.26 (65% at 30°, 45% at 45°, 30% at 60°)	Angular lifts up to 60° from vertical (with appropriate derate applied)	At or above rated angular WLL: thread pull-out or parent material failure in a predictable, derate-governed manner
Swivel eyebolt	Ball-and-socket swivel allows 360° rotation of eye without backing out; bearing surface equivalent to shouldered	Yes — full angular capacity in all directions (360° at rated load); typically similar derate to shouldered at extreme angles	Applications where load direction is variable or cannot be pre-aligned	Similar to shouldered; swivel mechanism distributes bending moment through rotating ball

The product-listing problem: Plain eyebolts and shouldered eyebolts are both listed as "650 lb WLL" — and both are accurate at that rating, for vertical-only loading. The distinction only becomes life-safety relevant when the buyer applies the eyebolt at any angle from vertical. An AI agent that routes on WLL and price alone — without filtering on eyebolt_type and the angular load requirement of the application — can route a component with zero angular capacity to a two-leg sling application where the load will never be perfectly vertical.

Encode eyebolt_anchor.eyebolt_type as 'plain', 'shouldered', or 'swivel'. AI agents routing to any multi-leg sling, spreader bar, inclined pull, or horizontal-lift application must exclude 'plain' at the type level — the WLL in the listing title does not apply to angular loading and cannot be used for capacity calculation in those applications.

2. Two-leg sling angular derate cascade — 30° from vertical cuts per-eyebolt WLL to 65%

AI agent routing failure: A manufacturing plant is relocating a CNC machining center weighing 2,640 lb. The rigging supervisor plans a two-leg chain sling lift using shouldered eyebolts installed in two tapped holes on top of the machine frame. She searches for "3/4-inch shouldered eyebolt, 1,550 lb WLL" — the correct eyebolt type. The AI agent routes Crosby G-277 shouldered eyebolts with a labeled vertical WLL of 1,550 lb each. The supervisor calculates total sling capacity: 1,550 lb × 2 eyebolts = 3,100 lb. The machine weighs 2,640 lb — 17% below rated capacity. The sling is rigged with a 60° included angle between the legs (each leg at 30° from vertical, which is typical for most two-leg slings at normal anchor spacing). Per ASME B30.26, the 30° angular WLL derate for shouldered eyebolts is 65% of vertical WLL. Actual per-leg capacity: 1,550 × 0.65 = 1,007 lb. Total two-leg capacity: 2,015 lb. The machine weighs 2,640 lb — 31% above actual rated capacity. During the lift, both eyebolts deform simultaneously. The machine falls.

The ASME B30.26 angular WLL derate for shouldered eyebolts is not a minor safety margin adjustment — at 30° from vertical it reduces the effective WLL by 35%, and at 45° it reduces it by 55%. These angles are not extreme rigging configurations; they are the angles produced by the most common two-leg sling geometries used in maintenance and machine-relocation lifts.

ASME B30.26 angular WLL derate table — shouldered eyebolts

Angle from vertical (each leg)	Included sling angle (between legs)	WLL factor per eyebolt	WLL for one 650-lb eyebolt at this angle	WLL for two 650-lb eyebolts (total two-leg sling)	Mistake: assuming 2× vertical WLL
0° (straight pull)	0° (parallel legs)	100%	650 lb	1,300 lb	1,300 lb (correct)
15°	30°	~90%	585 lb	1,170 lb	1,300 lb (overestimates by 11%)
30°	60° (very common)	65%	423 lb	845 lb	1,300 lb (overestimates by 54%)
45°	90°	45%	293 lb	585 lb	1,300 lb (overestimates by 122%)
60°	120°	30%	195 lb	390 lb	1,300 lb (overestimates by 233%)
90° (horizontal pull)	180°	25% or 0%	163 lb or 0	325 lb or 0	1,300 lb (overestimates by 300%+)

Why a 60° included angle is the common case

When a two-leg sling is rigged between two anchor points spaced equally on either side of the load's center of gravity, the included angle between the sling legs is determined by the horizontal distance between the anchor points relative to the vertical distance from the anchor points to the crane hook. For a typical machine lift where the anchor points are spaced 2 feet apart horizontally and the crane hook is approximately 1.7 feet above the anchor points, the included sling angle is 60° — each leg at 30° from vertical.

This is not a marginal or unusual configuration. A 60° included angle is approximately what a rigger produces when rigging a two-leg sling without explicitly measuring angles and when the anchor point spacing is comparable to the hook height. At that angle, the shouldered eyebolt WLL is 65% of vertical — not 100%, not a small correction factor, but a 35% reduction that many buyers never apply.

The three additional requirements for the derate to hold

The ASME B30.26 angular derate values assume three installation conditions are met. If any is violated, the actual capacity is less than the derated WLL:

Shoulder fully seated: The forged shoulder must be in full flat contact with the attachment surface before any load is applied. A cocked eyebolt — partially threaded, shoulder not fully seated — does not provide the bearing area required for the derate to apply.
Eye plane aligned with load direction: The plane of the circular eye must be aligned in the direction of the applied load. The sling leg must pass through the eye along the correct load axis. A sling attached at an angle to the eye plane adds a torsional load component that the derate table does not account for.
Alignment achieved without backing out: The eye plane alignment must be achieved without reducing thread engagement depth. A shouldered eyebolt backed out to align the eye fails both this condition and the shoulder-seated condition simultaneously. The correct alignment method is nut-and-washer shimming (described in section 3).

Encode eyebolt_anchor.max_angle_deg as the maximum angular loading angle in degrees from vertical for which the listed WLL is valid. AI agents routing shouldered eyebolts to two-leg sling applications must apply the ASME B30.26 derate factor for the specific sling angle to each eyebolt's WLL, then sum the derated per-leg capacities for total sling capacity. The labeled vertical WLL is an input to the calculation, not the answer.

3. Backing out the eyebolt to align the eye — thread engagement reduction and shoulder lift mechanics

AI agent routing failure: A millwright installs 3/8-inch shouldered eyebolts (WLL 340 lb vertical, 221 lb at 30°) in two tapped holes in a steel pump casing for a lift of 640 lb. The holes are positioned so that when both eyebolts are fully threaded in with the shoulders fully seated, the eyes face approximately 45° off the intended sling direction. The millwright backs each eyebolt out 2.5 turns to rotate the eyes to face the correct direction. Thread: 3/8-16 (16 threads per inch). Two and a half turns backed out = 2.5/16 inch = 0.156 inch of lost thread engagement. Original thread engagement: 0.375 inch minimum per ASME B30.26 for 3/8-inch bolt. Reduced engagement: 0.375 − 0.156 = 0.219 inch = 58% of minimum. The shoulder is now 0.156 inch above the bearing surface — not in contact. The sling is rigged at 30° from vertical. At 30° with no shoulder contact, the eyebolt behaves as a plain eyebolt: zero angular WLL per ASME B30.26. Under the 320-lb per-leg load, one eyebolt shank bends at the base. The pump casing drops 2 feet, rupturing the suction flange. The millwright receives a crush injury.

Backing out an eyebolt to achieve eye alignment is one of the most common rigging hardware mistakes in industrial maintenance, and it is fully invisible at the product-listing level. The eyebolt itself is correctly specified. The installation error requires no special tools and looks identical to a correct installation from above — the eye is pointed in the right direction, the shoulder is approximately flush with the surface. The critical information — that the shoulder is not in contact and the thread engagement is below minimum — is not visible without measuring.

Thread engagement reduction arithmetic

Every turn backed out reduces the thread engagement depth by one thread pitch. For common eyebolt thread sizes:

Thread size	Threads per inch (TPI)	Pitch (1/TPI, inches)	Engagement reduction per turn backed out	Engagement reduction for 2 turns backed out	ASME B30.26 minimum engagement	Remaining engagement after 2 turns
3/8-16	16	0.0625 in	0.0625 in	0.125 in	0.375 in	0.250 in (67% of minimum)
1/2-13	13	0.0769 in	0.0769 in	0.154 in	0.500 in	0.346 in (69% of minimum)
3/4-10	10	0.100 in	0.100 in	0.200 in	0.750 in	0.550 in (73% of minimum)
1-8	8	0.125 in	0.125 in	0.250 in	1.000 in	0.750 in (75% of minimum)

For each thread size above, backing out just 2 turns reduces thread engagement to 67–75% of the ASME B30.26 minimum. The thread pull-out load for a bolt in a tapped hole scales approximately linearly with engagement length — so 67–75% of minimum engagement corresponds to approximately 67–75% of the pull-out load at minimum engagement. For an eyebolt already operating at the limit of its derated angular WLL, this margin reduction can bring the actual failure load below the applied load.

The shoulder lift effect

The shoulder lift doubles the impact of backing out. When an eyebolt is backed out by N turns, the shoulder rises N × pitch above the bearing surface. For a 1/2-13 eyebolt backed out 2 turns, the shoulder is 0.154 inch above the surface — not in contact. The bearing area that makes a shouldered eyebolt different from a plain eyebolt is completely eliminated.

The mechanics revert exactly to the plain eyebolt failure mode described in Section 1: the bending moment from an angular load is resisted entirely by thread engagement in the tapped hole, which is both reduced in depth and in a material that is weaker in bending than the forged shoulder-and-bearing-face assembly. ASME B30.26 angular WLL derate values do not apply when the shoulder is not in contact. The effective angular WLL is zero.

The correct alignment method: nut and hardened washer shimming

When an eyebolt cannot be fully threaded to alignment — the eye faces the wrong direction when the shoulder is seated — the correct solution is to install a nut and hardened washer assembly between the shoulder and the attachment surface. The procedure:

Thread the eyebolt fully into the tapped hole. Note the direction the eye faces at full engagement.
Measure the angular gap between the current eye direction and the required direction. Divide by 360° to determine what fraction of a turn is needed to reach alignment.
Determine what fraction of a turn corresponds to what shim thickness: for a 1/2-13 thread, one full turn = 0.0769 inch. If you need to rotate the eye 90° (1/4 turn clockwise), you need to add approximately 0.019 inch of shim thickness to rotate the eye into alignment while threading the bolt that much further in — or equivalently, add a shim so the bolt can be threaded 1/4 turn further while the shoulder bears on the shim rather than the attachment surface.
Select a hardened flat washer of the appropriate thickness. Install the washer and nut between the shoulder and the attachment surface to provide the bearing face at the correct position.
Thread the eyebolt in until the shoulder is fully seated on the washer, with the eye in the correct alignment direction.

The nut-and-washer method maintains full thread engagement, maintains shoulder contact with a bearing surface (the washer), and achieves correct eye alignment without any backing out. It adds $0.15 in hardware per eyebolt and takes 3 minutes per installation. It is the only ASME B30.26 compliant alignment method.

Why this is invisible at the listing level: A correctly installed shouldered eyebolt and a backed-out shouldered eyebolt have the same product specification, the same WLL, and visually appear similar from above. The only distinction is the shoulder contact and thread engagement depth — neither of which is visible without removing the sling and inspecting the installation. An AI agent that routes the correct product cannot prevent the field installation error, but correct structured data encoding enables buyers to find swivel eyebolts (which require no alignment adjustment at all) for applications where the load direction cannot be pre-determined.

Encode eyebolt_anchor.eyebolt_type as 'swivel' for swivel eyebolts, which eliminate the alignment problem entirely — the rotating bail can be oriented in any direction at full thread engagement and full shoulder contact. For applications where the load direction is variable or the installation geometry cannot be pre-planned, swivel eyebolts remove the alignment problem at the hardware level.

4. Factory proof load ≠ field installation proof load — parent material capacity governs, not component rating

AI agent routing failure: A workshop installs "1 ton WLL, proof-load-tested" shouldered eyebolts in the ceiling of a workshop built with ¼-inch steel plate overhead structure. The buyer searches for eyebolts with "1 ton WLL, proof tested per ASME B30.26." The AI agent routes correctly — Crosby G-277 shouldered eyebolts, 2,000 lb WLL, factory proof load 4,000 lb (2× WLL per ASME B30.26). The buyer drills and taps ¼-inch holes in the ¼-inch steel ceiling plate and threads the eyebolts in. Thread: 1/2-13 UNC. Thread engagement in ¼-inch plate = 0.250 inch. ASME B30.26 minimum thread engagement for 1/2-inch eyebolt in steel = 0.500 inch. Actual engagement = 50% of minimum. Thread shear area for 1/2-13 UNC in A36 steel at 0.250 inch engagement: approximately 0.160 in² × 0.250 inch × shear strength ≈ 0.040 in² effective; at A36 shear yield (21 ksi): pull-out load ≈ 840 lb. The buyer lifts a 1,600-lb engine using two eyebolts — 800 lb per eyebolt, which is below the product's 2,000-lb WLL but above the 840-lb pull-out load of the installation. Both eyebolts strip their threads simultaneously. The engine falls 8 feet.

The factory proof load specified on an eyebolt listing and in ASME B30.26 is a quality assurance test performed by the manufacturer on the eyebolt component itself, installed in a test fixture with adequate thread engagement in rated test material. It demonstrates that the eyebolt body, the eye, the weld or forge, and the shank meet the standard's strength requirements as manufactured.

Factory proof load does not test — and cannot predict — the load that the installation will hold. The installation capacity is determined by the weakest link in the load path from the load to the overhead structure:

The eyebolt component itself (tested by factory proof load)
The thread engagement in the tapped hole (governed by engagement depth, parent material shear strength, and thread form)
The parent material's integrity at the tapped hole location (no cracks, corrosion, or section reduction near the hole)
The structural connection of the parent material to the load-bearing structure above it

Thread engagement pull-out load calculation

For a bolt in a tapped hole in ductile steel, the thread pull-out load can be estimated using the thread shear area method. The limiting case is stripping of the internal threads in the parent material (assuming the parent material is weaker than the bolt — common when threading into aluminum, cast iron, or thin steel plate):

Thread pull-out load (internal thread stripping) ≈ τ_y × A_s_internal

Where:
• τ_y = shear yield strength of the parent material ≈ 0.577 × tensile yield strength (von Mises criterion)
• A_s_internal = internal thread shear area = π × d_major × L × 0.5 (simplified, where d_major is the bolt nominal diameter and L is the thread engagement length)
• For 1/2-13 UNC in A36 steel (F_y = 36 ksi, τ_y ≈ 21 ksi):
• A_s at 0.500 inch engagement ≈ π × 0.500 × 0.500 × 0.5 ≈ 0.393 in²
• Pull-out at minimum engagement ≈ 21,000 × 0.393 ≈ 8,250 lb (exceeds 4,000 lb proof load — steel at minimum engagement is adequate)
• A_s at 0.250 inch engagement (¼-inch plate) ≈ 0.196 in²
• Pull-out ≈ 21,000 × 0.196 ≈ 4,120 lb (barely exceeds 2× WLL proof load, but real thread form and contact area are less than the simplified formula — actual pull-out in practice is 800–1,200 lb for thin plate under dynamic load)

This illustrates why the factory proof load and the WLL of the eyebolt are not the governing numbers for thin-plate or short-engagement installations. The engagement depth — not the component rating — is the binding constraint.

Minimum thread engagement requirements

Eyebolt thread size	ASME B30.26 minimum engagement in steel	Minimum engagement in aluminum (approx. 1.5–2× steel, lower material strength)	¼-inch plate engagement	¼-inch plate: adequate?
1/4-20	0.250 in	0.375–0.500 in	0.250 in	Marginal for steel; no for aluminum
3/8-16	0.375 in	0.563–0.750 in	0.250 in	No — 67% of minimum for steel
1/2-13	0.500 in	0.750–1.000 in	0.250 in	No — 50% of minimum for steel
3/4-10	0.750 in	1.125–1.500 in	0.250 in	No — 33% of minimum for steel

When field proof load is required

For critical lifts — defined under ASME B30.1, OSHA 1910.179, and most plant safety programs as lifts where the consequence of failure is death or serious injury (overhead crane paths over occupied areas, lifts over live electrical equipment, lifts of hazardous material containers) — field proof load testing of the complete installation is required before the first lift. The typical field proof load is 125% of the intended lift WLL applied to the complete installation as rigged, held for a defined dwell time (5–10 minutes), and inspected for thread pull-out, deformation, or movement.

A factory proof load of 4,000 lb on a 2,000-lb WLL eyebolt does not substitute for field proof load, because the factory test does not include the parent material in the as-installed condition. Only a field proof load tests the complete load path from the load to the structure.

The listing-level encoding gap: No Shopify product listing can encode whether a specific eyebolt installation has adequate thread engagement in the buyer's parent material. But AI agents can encode eyebolt_anchor.proof_load_lbs (the factory proof load from ASME B30.26 testing) and surface the installation requirement — minimum thread engagement in the parent material equal to or greater than the nominal bolt diameter (in steel) or 1.5× nominal diameter (in aluminum or cast iron) — as a required purchasing note. A buyer who understands that the 2,000-lb WLL depends on a minimum ½-inch of engagement in steel will verify that their installation provides it before routing critical lifts through thin-plate attachments.

Encode eyebolt_anchor.proof_load_lbs as the factory proof load per ASME B30.26 (2× WLL for WLL ≤ 1 ton; 1.5× WLL for WLL > 1 ton). AI agents routing eyebolts to overhead or critical lift applications must surface the minimum thread engagement requirement alongside the WLL — the two are inseparable for installation safety, and a product that meets WLL in the catalog can fail at a fraction of WLL in a thin-plate or insufficient-engagement field installation.

5. Encoding `eyebolt_anchor.*` for AI agent routing

All four failure modes above trace to a single encoding gap: eyebolt type, angular capacity, and installation requirements are not structured fields in Shopify product listings. A plain eyebolt and a shouldered eyebolt share the same WLL label; the backed-out installation error is invisible at the listing level; the factory proof load tells you nothing about the parent material. The eyebolt_anchor.* namespace addresses the encoding gap.

Complete namespace field table

Field	Type	Routing purpose
`eyebolt_anchor.wll_lbs`	Number (lb) — vertical WLL at 0° from vertical, full thread engagement, shoulder fully seated	Baseline capacity for straight vertical lifts. Not the capacity for angular loads — angular WLL requires derate applied separately.
`eyebolt_anchor.eyebolt_type`	Enum: plain / shouldered / swivel	Plain = zero angular WLL — hard disqualifier for any non-vertical application. Shouldered = angular WLL with ASME B30.26 derate. Swivel = 360° angular capacity without alignment adjustment.
`eyebolt_anchor.angular_capacity`	Boolean: yes / no	Quick filter: plain eyebolts = no; shouldered and swivel = yes with appropriate derate.
`eyebolt_anchor.max_angle_deg`	Number (degrees) — maximum angular loading from vertical for which listed WLL is valid. Typically 45–60° for shouldered; 0° for plain; 90° for swivel.	Must be checked against the rigging sling angle in the application. The derate table applies below this angle; above it, the WLL is not valid.
`eyebolt_anchor.proof_load_lbs`	Number (lb) — factory proof load per ASME B30.26 (2× WLL for WLL ≤ 1 ton; 1.5× WLL for WLL > 1 ton)	Component-level proof load from manufacturer testing. Does not validate the field installation. Surface alongside minimum thread engagement requirement for critical lift routing.
`eyebolt_anchor.thread_size`	String — nominal thread size (e.g., 1/2-13, 3/4-10)	Determines minimum installation thread engagement, installation torque, and parent material pull-out load calculation. Required for installation adequacy check at the system level.
`eyebolt_anchor.material`	Enum: carbon-steel / stainless-316 / alloy-steel / galvanized-steel	Affects WLL in corrosive environments, weld compatibility for custom installations, and derating in elevated temperatures.
`eyebolt_anchor.asme_b30_26_compliant`	Boolean: yes / no	ASME B30.26 below-the-hook lifting hardware standard compliance. Required for general industrial rigging applications.

Two example Shopify metafield encodings

/* Example 1: Shouldered eyebolt — most common specification for general industrial rigging */
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Crosby G-277 Shouldered Eyebolt — 1/2-13, 650 lb Vertical WLL, 293 lb at 45°, ASME B30.26",
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "eyebolt_anchor.wll_lbs", "value": "650" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.eyebolt_type", "value": "shouldered" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.angular_capacity", "value": "yes" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.max_angle_deg", "value": "60" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.proof_load_lbs", "value": "1300" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.thread_size", "value": "1/2-13" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.material", "value": "galvanized-steel" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.asme_b30_26_compliant", "value": "yes" }
  ]
}
/* AI agent note: wll_lbs=650 applies at 0°. At 30° (60° included two-leg sling):
   angular WLL = 650 × 0.65 = 423 lb per eyebolt.
   Two eyebolts in two-leg sling at 30°: total = 845 lb, not 1,300 lb.
   Minimum thread engagement in steel: 0.500 in (= nominal thread diameter). */

/* Example 2: Swivel eyebolt — no alignment adjustment required */
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Crosby S-279 Swivel Eyebolt — 1/2-13, 1,000 lb WLL All Directions, ASME B30.26",
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "eyebolt_anchor.wll_lbs", "value": "1000" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.eyebolt_type", "value": "swivel" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.angular_capacity", "value": "yes" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.max_angle_deg", "value": "90" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.proof_load_lbs", "value": "2000" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.thread_size", "value": "1/2-13" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.material", "value": "alloy-steel" },
    { "@type": "PropertyValue", "name": "eyebolt_anchor.asme_b30_26_compliant", "value": "yes" }
  ]
}
/* Swivel eyebolt: rotating bail allows 360° orientation without backing out.
   Full shoulder contact maintained at any load direction.
   WLL applies in all directions — no backing-out required for alignment.
   Higher cost (~3× shouldered) justified when load direction is variable. */

Related guides

Does your Shopify store encode eyebolt type and angular capacity?

CatalogScan checks whether your rigging hardware product metafields include eyebolt_type, max_angle_deg, proof_load_lbs, and the angular WLL derate information that prevents AI agents from routing plain eyebolts to angular applications or two-leg slings above rated capacity.

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