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MS9490-56
Military Standard Bolt
Description
Fastener Length: 5-1/2", Thread: 1/4-28, Thread Length: 13/16"
Specifications
| Fastener Length | 5.490 inches minimum and 5.510 inches maximum |
|---|---|
| Features Provided | Finished head |
| Grip Length | 4.690 inches minimum and 4.750 inches maximum |
| Hardness Rating | 34.0 rockwell c minimum and 44.0 rockwell c maximum |
| Head Height | 0.146 inches minimum and 0.166 inches maximum |
| Head Style | Hexagon Head |
| Length | 5 1/2 |
| Material | Iron |
| Material Specification | Ams5731 assn std single material response |
| Min. Tensile Strength (psi) | 175000 pounds per square inch |
| Minimum Yield Strength | 115000 pounds per square inch |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.740 inches minimum and 0.820 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.430 inches minimum and 0.439 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS9490-56. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error