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AS3580-4-20
Machine Bolt
Description
Fastener Length: 1-1/4", Thread: 1/4-28, Thread Length: 1-1/4
Specifications
| Extended Washer Diameter | 0.428 inches minimum and 0.448 inches maximum |
|---|---|
| Extended Washer Thickness | 0.060 inches minimum and 0.080 inches maximum |
| Fastener Length | 1.240 inches minimum and 1.260 inches maximum |
| Head Height | 0.293 inches minimum and 0.313 inches maximum |
| Head Style | Double hexagon extended washer |
| Length | 1 1/4 |
| Material | Nickel |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.250 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.375 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for AS3580-4-20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error