Elevator Bolt
Bolts · belt bolt · flat head square neck bolt
Definition: An elevator bolt has a large, thin, flat head and a square neck — used to fasten conveyor belts and bucket elevator buckets to their backing.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: ASME B18.2.1 · Manufacturer specified
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 1/4-20 | M6 | 7/8 | 1/16 |
| 5/16-18 | M8 | 1-1/16 | 5/64 |
| 3/8-16 | M10 | 1-1/4 | 3/32 |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Grade 2 | low carbon steel | 74,000 | None |
| Grade 5 | medium carbon steel, Q&T | 120,000 | 3 radial lines |
Materials
- Zinc-plated steel
- Stainless steel
Pros & Cons
Pros
- Large bearing head spreads load on belting
- Low-profile head
- Square neck prevents spin
Cons
- Specialty item — not stocked everywhere
- Limited grades
- Head can pull through very soft belting
Typical Uses
- Conveyor belting
- Bucket elevators
- Grain handling
- Thin-material fastening
Alternatives & Related
- Carriage Bolt — Domed head for wood and general work
- Flange Bolt — Built-in washer face on the head
Where to Buy
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FAQ
What is an elevator bolt used for?
Fastening elevator and conveyor buckets to belts, and any thin material where a wide, low-profile head is needed.
Elevator bolt vs carriage bolt?
Both have a square neck; an elevator bolt has a thin, wide flat head for belting, a carriage bolt a rounded dome head for wood.