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MS9558-34
Military Standard Bolt
Description
Fastener Length: 2-63/64", Thread: 5/16-24, Thread Length: 0-63/64"
Specifications
| Extended Washer Diameter | 0.490 inches minimum and 0.510 inches maximum |
|---|---|
| Extended Washer Thickness | 0.166 inches minimum and 0.186 inches maximum |
| Fastener Length | 2.990 inches minimum and 3.010 inches maximum |
| Head Height | 0.338 inches minimum and 0.358 inches maximum |
| Head Style | Double hexagon extended washer |
| Length | 2 63/64 |
| Material | Steel |
| Material Specification | Ams5731 assn std 1st material response |
| Special Features | 130 ksi minmum;6.58 approximate mass pound per 100 |
| Surface Finish | 125.0 microinches |
| Thread Class | 3a |
| Thread Diameter | 0.3125 |
| Thread Direction | Right-hand |
| Thread Length | 0.925 inches minimum and 1.885 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNJF |
| Thread Size | 5/16 |
| Width Between Flats | 0.3750 |
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 MS9558-34. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error