bolts › machine bolts
MS9491-42
Military Standard Bolt
Description
Fastener Length: 4-1/64", Thread: 5/16-24, Thread Length: 29/32"
Specifications
| Fastener Length | 4.000 |
|---|---|
| Head Height | 0.188 |
| Head Style | Hexagon Head |
| Material | Iron |
| Material Specification | Ams 5731 assn std single material response |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.905 inches minimum and 0.988 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.492 inches minimum and 0.502 inches maximum |
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 MS9491-42. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error