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MS9555-03
Military Standard Machine Screw
Description
Fastener Length: 5/16", Thread: 8-36, Thread Length: 15/64
Specifications
| Extended Washer Diameter | 0.302 inches minimum and 0.322 inches maximum |
|---|---|
| Extended Washer Thickness | 0.030 inches minimum |
| Fastener Length | 0.302 inches minimum and 0.322 inches maximum |
| Hardness Rating | 24.0 rockwell c minimum and 35.0 rockwell c maximum |
| Head Height | 0.220 inches minimum and 0.240 inches maximum |
| Head Style | Double hexagon extended washer |
| Length | 5/16 |
| Material | Iron |
| Min. Tensile Strength (psi) | 130000 pounds per square inch |
| Screw Material | Iron alloy 660 |
| Thread Class | 3a |
| Thread Diameter | 0.164 |
| Thread Direction | Right-hand |
| Thread Length | 0.220 inches minimum and 0.260 inches maximum |
| Thread Qty | 36 |
| Thread Qty Per Inch (tpi) | 36 |
| Thread Series Designator | UNJF |
| Thread Size | 8 |
| Width Between Flats | 0.219 |
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.
- MS9555-02 MS #8-36 · 5/16 in · Double hexagon extended washer · Iron
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Catalog data updated 2026-07-05. Report a data error