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MS18211-19C
Military Standard Screw
Description
Fastener Length: 9/32", Thread: 4-40, Thread Length: 1/4"
Specifications
| Countersink Angle | 80.0 degrees minimum and 82.0 degrees maximum |
|---|---|
| Fastener Length | 0.281 inches minimum and 0.312 inches maximum |
| Head Diameter | 0.191 inches minimum and 0.225 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Slot |
| Length | 5/16 |
| Screw Material | Plastic polyhexamethylene adipamide |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.245 inches minimum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
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.
- MS51959-14B MS #4-40 · 5/16 in · Flat countersunk · CRES
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Catalog data updated 2026-07-05. Report a data error