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MS9218-12
Military Standard Machine Bolt
Description
Fastener Length: 7/8", Hole Diameter: 5/64", Thread: 1/4-28, Thread Length: 47/64"
Specifications
| Extended Washer Diameter | 0.438 |
|---|---|
| Extended Washer Thickness | Between 0.060 inches and 0.070 inches |
| Fastener Length | 0.875 |
| Features Provided | Finished head |
| Grip Length | Between 0.125 inches and 0.145 inches |
| Hardness Rating | 42.0 rockwell c and 46.0 rockwell c |
| Head Height | 0.330 |
| Head Style | Double hexagon w/hole |
| Hole Configuration Style | Hexagon longitudinal hole |
| Hole Diameter | 0.070 |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Length | 7/8 |
| Material | CRES |
| Material Specification | Ams 6304 assn standard single material response |
| Min. Tensile Strength (psi) | 195000 pounds per square inch |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Ams 2416 assn standard single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.730 inches and 0.750 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 0.305 inches and 0.313 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 MS9218-12. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error