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MS18212-18
Military Standard Machine Screw
Description
Fastener Length: 19/32", Thread: 4-40, Thread Length: 37/64
Specifications
| Fastener Length | 0.594 inches minimum and 0.625 inches maximum |
|---|---|
| Head Diameter | 0.205 inches minimum and 0.219 inches maximum |
| Head Height | 0.058 inches minimum and 0.068 inches maximum |
| Head Style | Pan no. 2 |
| Internal Drive Style | Slot |
| Length | 5/8 |
| Screw Material | Plastic polyhexamethylene amide |
| Screw Material Specification | Mil-m-20693 ty 1 mil spec single material response |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.575 inches minimum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
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.
- AA55624-28 Other #4-40 · 5/8 in · Pan no. 2
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Catalog data updated 2026-07-05. Report a data error