screws › socket head cap screws
MS21295-33
Military Standard Screw
Description
Fastener Length: 5/8", Thread: 4-40, Head Width: 3/32", Thread Length: 37/64"
Specifications
| Fastener Length | 0.610 inches minimum and 0.640 inches maximum |
|---|---|
| Hardness Rating | 80.0 rockwell b minimum |
| Head Diameter | 0.176 inches minimum and 0.183 inches maximum |
| Head Height | 0.108 inches minimum and 0.112 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 5/8 |
| Locking Feature | Patch threads or pellet threads or strip threads |
| Material | Steel |
| Material Specification | 66 fed std single material response |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Minimum Yield Strength | 30000 pounds per square inch |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-s-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.560 inches minimum and 0.590 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
| Width Across Flats | 0.094 inches minimum and 0.095 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 MS21295-33. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error