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MS21279-08
Military Standard Machine Bolt
Description
Fastener Length: 5/8", Thread: 10-32, Thread Length: 9/16
Specifications
| Extended Washer Diameter | 0.375 |
|---|---|
| Extended Washer Thickness | Between 0.040 inches and 0.050 inches |
| Fastener Length | 0.625 |
| Features Provided | Finished head |
| Hardness Rating | 248.0 brinell standard and 341.0 brinell standard |
| Head Height | 0.260 |
| Head Style | Double hexagon w/hole |
| Length | 5/8 |
| Material | Iron |
| Material Specification | Ams 5732 assn standard single material response |
| Min. Tensile Strength (psi) | 140000 pounds per square inch |
| Minimum Yield Strength | 85000 pounds per square inch |
| Surface Finish | 32.0 microinches threads, 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.563 inches and 0.625 inches |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 10 |
| Width Between Flats | Between 0.243 inches and 0.251 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS9146-08 MS #10-32 · 5/8 in · Double hexagon w/hole · Steel
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Catalog data updated 2026-07-05. Report a data error