The collar is what makes an eyebolt usable at an angle. It is a machined face that seats hard against the load, so a sideways pull is resisted by the collar bearing on the surface rather than by bending the thread. That means a collared eyebolt can be used in a multi-leg sling, where every leg is at an angle by definition, provided the Working Load Limit is reduced accordingly.
The **long shank** version suits deep tapped holes and thick parent material, where a standard shank would not reach far enough to develop full thread engagement. Engagement depth is one of the more common failures in eyebolt use, and a long shank removes the problem where the material allows it.
Key Features
- Collared design: Permits angular loading with appropriate derating, unlike a dynamo eyebolt which is vertical only.
- Long shank: Full thread engagement in deep holes and thick material.
- Drop forged and heat treated: High tensile steel with the grain following the eye.
- 5:1 minimum breaking load to BS 4278.
- Six metric sizes: M10 through M30.
- Self colour or electro galvanised.
- Fully marked: CE, W.L.L., size and product ID mark.
Technical Specifications
| Product Code |
W.L.L. (t) |
A (mm) |
B (mm) |
D (mm) |
E (mm) |
F (mm) |
G (mm) |
H (mm) |
Weight (kgs) |
| EBCLSM10 |
0.25 |
10 |
22 |
7 |
15 |
9 |
19.5 |
178 |
0.18 |
| EBCLSM12 |
0.4 |
12 |
28 |
11 |
19 |
11 |
24.5 |
178 |
0.25 |
| EBCLSM16 |
0.8 |
16 |
36 |
14 |
24 |
14 |
32 |
178 |
0.44 |
| EBCLSM20 |
1.6 |
20 |
43 |
17 |
29 |
16.5 |
38 |
178 |
0.7 |
| EBCLSM24 |
2.5 |
24 |
57 |
19 |
38 |
22 |
46 |
178 |
1.05 |
| EBCLSM30 |
4 |
30 |
71 |
24 |
48 |
28 |
64 |
178 |
2.8 |
Working Load Limits and full dimensional data are on the specification sheet. Contact GT Lifting for the derating figures applicable to non-axial loading.
BS 4278 | Collared | MBL 5 x W.L.L. | Angular Loading Permitted With Derating
Drop forged high tensile steel, heat treated, meeting the Working Load Limit performance requirements of BS 4278. Minimum breaking load is five times the W.L.L. The collar permits use at an angle, but the Working Load Limit must be reduced accordingly. GT Lifting publish the reduction factors; contact us for the figures applicable to your loading angle. Under LOLER 1998, thorough examination by a competent person at intervals not exceeding 12 months.
Suitable Applications
Collared eyebolts are the correct lifting point wherever a load is lifted by more than one point, since multi-leg slings apply load at an angle to every eyebolt. That covers machinery and equipment installation, fabricated assemblies, moulds and dies, and any load with tapped lifting points lifted by a two, three or four leg sling. The long shank version specifically suits thick sections, deep counterbored holes and situations where a standard shank cannot develop full engagement.
More About This Product
Lifting points are the only part of a lifting assembly that stays with the load, and that changes how they should be thought about. A sling belongs to the lifting company and gets inspected on a schedule. An eyebolt tapped into a gearbox belongs to the gearbox, gets painted over, corrodes quietly and is still expected to work five years later when someone needs to move the machine.
Which is why the thread and the tapped hole matter more than the eyebolt itself. The fitting is certified; the hole in the casting is not, and a worn, corroded or under-depth thread will fail long before the eyebolt does.
Angular Loading and Why the Collar Exists
The single most consequential distinction in this category is between a plain eyebolt and a collared one, and it comes down to what happens when the pull is not vertical.
A plain eyebolt has no machined face bearing on the load. Pull it sideways and the entire bending moment acts on the thread root — the point where the shank meets the thread, inside the hole, where nobody can see it. Alloy steel is strong in tension and much less tolerant of bending at a stress concentration, which is why plain eyebolts have no published derating table for angular load. There is no permitted angle because the design does not accommodate one.
A collared eyebolt has a machined face that seats hard against the load. Side load is resisted by that face rather than by the thread, which is why collared eyebolts carry a derating table and plain ones do not. The collar only works if it is fully seated — wound down onto a clean flat face with no gap. A collared eyebolt not tightened home is a plain eyebolt.
A swivel hoist ring removes the decision entirely: it pivots and rotates to align with the pull whatever direction that is, which is why it costs more and why it is the right answer where different people rig the same load.
How to Use the Collared Eyebolt
- Screw fully home so the collar seats: The collar must bear firmly against the load face. That contact is what resists side load, and an unseated collar gives you a dynamo eyebolt with extra steps.
- Align the eye with the sling leg: The eye should lie in the plane of the pull. Loading across the eye is not permitted.
- Apply the derating for your angle: The W.L.L. reduces as the angle increases. Contact us for the figures rather than estimating.
- Check thread engagement depth: The long shank needs a correspondingly deep hole.
- Check the parent material: The rating assumes sound steel of adequate thickness.
- Do not modify: Never weld, heat, machine or drill.
Warning: The collar must seat fully against the load face. An eyebolt not screwed fully home cannot resist side loading and behaves as an uncollared eyebolt. Angular loading requires the Working Load Limit to be reduced; contact us for the figures.
Safety Information
- Never exceed the marked Working Load Limit, derated for the loading angle.
- The collar must be fully seated against the load face.
- Align the eye with the direction of pull. Do not load across the eye.
- Confirm the tapped hole allows full thread engagement of the long shank.
- The parent material must be capable of carrying the load.
- Inspect the eyebolt thread, collar face and tapped hole before every use.
- Withdraw any eyebolt showing thread damage, collar damage, eye distortion or cracks.
- Never weld, heat treat, machine or repaint.
- Thorough examination by a competent person required at intervals not exceeding 12 months under LOLER 1998.
Inspection and Maintenance
Three areas need attention. The thread, for damage, stretching, corrosion and bending at the root. The collar face, for damage, wear and any distortion, since a collar that no longer seats flat cannot resist side load and the eyebolt reverts to vertical-only behaviour without anyone noticing. And the eye itself, for elongation, distortion and wear beyond the manufacturer’s stated limit of original dimensions. Inspect the tapped hole in the parent material too, which sits outside the eyebolt's certification but fails just as readily.
Downloads
Frequently Asked Questions
Q: How much do I derate for an angle?
It depends on the angle and increases steeply. GT publish the reduction factors and we can supply them for your loading configuration. Do not estimate: the reduction at angle is substantial and the manufacturer’s derating table must be used.
Q: Long shank or standard?
Long shank where the tapped hole is deep or the parent material thick, so full thread engagement can be achieved. Standard where the hole depth suits it. An eyebolt that bottoms out before the collar seats is unusable, and one that cannot engage fully is dangerous.
Q: Why must the collar seat fully?
Because the collar bearing on the load face is what resists side loading. If it is not seated, side load goes into the thread instead, which is exactly the failure mode collared eyebolts exist to prevent. A partially screwed collared eyebolt is a dynamo eyebolt with a false sense of security.
Q: Collared eyebolt or swivel hoist ring?
A collared eyebolt is fixed and must be aligned with the pull. A swivel hoist ring rotates and pivots to align itself, so it handles varying load directions without needing to be positioned. The hoist ring costs several times more and is worth it where the load direction changes or cannot be predicted.
