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MS9915-12
Military Standard Machine Bolt
Description
Fastener Length: 7/8", Thread: 1/4-28, Thread Length: 51/64", MS9915 series bolt
Specifications
| Extended Washer Diameter | Between 0.428 inches and 0.448 inches |
|---|---|
| Extended Washer Thickness | 0.06 |
| Fastener Length | Between 0.865 inches and 0.885 inches |
| Features Provided | Finished head |
| Grip Length | Between 0.079 inches and 0.125 inches |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Height | Between 0.293 inches and 0.313 inches |
| Head Style | Double hexagon extended washer |
| Length | 7/8 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium |
| Thread Class | 3a |
| Thread Diameter | 0.25 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.740 inches and 0.806 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.302 inches and 0.322 inches |
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 MS9915-12. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error