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MS9218-07
Military Standard Bolt
Description
Fastener Length: 9/16", Hole Diameter: 1/16", Thread: 1/4-28, Thread Length: 13/32"
Specifications
| Extended Washer Diameter | 0.438 |
|---|---|
| Extended Washer Thickness | 0.060 inches minimum and 0.070 inches maximum |
| Fastener Length | 0.562 |
| Features Provided | Finished head |
| Grip Length | 0.150 inches minimum and 0.170 inches maximum |
| Hardness Rating | 42.0 rockwell c minimum and 46.0 rockwell c maximum |
| Head Height | 0.330 |
| Head Style | Double hexagon w/hole |
| Hole Configuration Style | Double hexagon longitudinal hole |
| Hole Diameter | 0.062 |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Length | 1/2 |
| Material | CRES |
| Material Specification | Ams 6304 assn std single material response |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Nickel and cadmium |
| Surface Treatment Specification | Ams 2416 assn std all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.392 inches minimum and 0.412 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.305 inches minimum and 0.313 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
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Catalog data updated 2026-07-05. Report a data error