Eye Bolt
Bolts · eye screw · forged eye bolt · lifting eye
Definition: An eye bolt is a bolt with a closed loop (eye) at one end for attaching ropes, cables, or hooks — used for rigging, lifting, and tie-downs.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: ASME B18.15
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 1/4-20 | M6 x 1.0 | 1 eye | 480 lb WLL* |
| 3/8-16 | M10 x 1.5 | 1-1/4 eye | 1200 lb WLL* |
| 1/2-13 | M12 x 1.75 | 1-1/2 eye | 2200 lb WLL* |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Forged carbon steel | carbon steel, forged | — | Working load stamped |
| Stainless | 304 / 316 stainless | — | Lower WLL than steel |
Materials
- Forged carbon steel (galvanized)
- Stainless steel 304 / 316
Pros & Cons
Pros
- Strong, convenient attachment point
- Forged (shouldered) types are rated for lifting
- Many sizes and finishes
Cons
- Working load drops sharply at an angle
- Non-shouldered eyes can bend open under load
- Needs a matching nut or strong tapped base
Typical Uses
- Lifting and rigging
- Cable and rope attachment
- Tie-down anchors
- Guy wires and suspension
Alternatives & Related
- U-Bolt — Clamps around pipe and tube instead of attaching to a point
- Threaded Rod — For custom-length hangers with nuts both ends
Where to Buy
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FAQ
Can you lift with an eye bolt?
Only with a shouldered, forged eye bolt, and only in line with the shank. Angular pulls derate the load dramatically — follow the stamped working-load chart.
Eye bolt vs eye screw?
An eye bolt has machine threads for a nut or tapped hole; an eye screw has coarse wood threads and screws into wood. Use the right one for the base material.