screws › socket head cap screws
MS21295-52
Military Standard Screw
Description
Fastener Length: 7/8", Thread: 3/8-24, Head Width: 5/16", Thread Length: 7/8"
Specifications
| Fastener Length | 0.860 inches minimum and 0.890 inches maximum |
|---|---|
| Hardness Rating | 80.0 rockwell b minimum |
| Head Diameter | 0.550 inches minimum and 0.562 inches maximum |
| Head Height | 0.368 inches minimum and 0.375 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 7/8 |
| Locking Feature | Patch threads or pellet threads or strip threads |
| Material | CRES |
| Material Specification | 66 fed std all material responses fastener |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Minimum Yield Strength | 30000 pounds per square inch |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response fastener |
| Thread Class | 3a |
| Thread Diameter | 0.375 |
| Thread Direction | Right-hand |
| Thread Length | 0.807 inches minimum and 0.890 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 3/8 |
| Width Across Flats | 0.312 inches minimum and 0.316 inches maximum |
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.
- NAS1351-6-14 NAS 3/8-24 · 7/8 in · Flat chamfer · Steel
- NAS1351C6-14 NAS 3/8-24 · 7/8 in · Flat chamfer · CRES
- NAS1351N6-14 NAS 3/8-24 · 7/8 in · Flat chamfer · Iron
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Catalog data updated 2026-07-05. Report a data error