bolts › internal wrenching bolts
MS20005-56
Military Standard Bolt
Description
Fastener Length: 4-1/16", Thread: 1/4-24, Head Width: 7/32", Thread Length: 37/64"
Specifications
| Fastener Length | 4.047 inches minimum and 4.077 inches maximum |
|---|---|
| Hardness Rating | 34.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.521 inches minimum and 0.531 inches maximum |
| Head Height | 0.302 inches minimum and 0.322 inches maximum |
| Head Style | Bevel-conical |
| Internal Drive Style | Hexagon |
| Length | 4 1/16 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 class 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.537 inches minimum and 0.587 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Across Flats | 0.219 inches minimum and 0.221 inches maximum |
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 MS20005-56. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error