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MS51963-211
Military Standard Setscrew
Description
Fastener Length: 3/16", Thread: 4-40, Head Width: 1/16", Thread Length: 3/16
Specifications
| Fastener Length | 0.178 inches minimum and 0.198 inches maximum |
|---|---|
| Hardness Rating | 45.0 rockwell c minimum and 53.0 rockwell c maximum |
| Head Style | Headless (setscrew) |
| Internal Drive Style | Hexagon |
| Length | 3/16 |
| Locking Feature | Pellet threads |
| Material | Steel |
| Material Specification | 66 fed std all material responses or aisi assn std all material responses |
| Point Style | Cup |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.178 inches minimum and 0.198 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
| Width Across Flats | 0.050 |
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.
- AN565B4H3 AN #4-40 · 3/16 in · Headless (setscrew) · Steel
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Catalog data updated 2026-07-05. Report a data error