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MS21090-12
Military Standard Screw
Description
Fastener Length: 3/8", Thread: 4-40, Thread Length: 3/8"
Specifications
| Fastener Length | 0.344 inches minimum and 0.375 inches maximum |
|---|---|
| Head Diameter | 0.205 inches minimum and 0.219 inches maximum |
| Head Height | 0.070 inches minimum and 0.080 inches maximum |
| Head Style | Pan Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 |
| Locking Feature | Patch threads or pellet threads or strip threads |
| Material | CRES |
| Min. Tensile Strength (psi) | 55000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 9c style |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2 cl 3 fed spec single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.294 inches minimum and 0.375 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error