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MS51021-102
Military Standard Setscrew
Description
Fastener Length: 3/16", Thread: 4-40, Head Width: 1/16", Thread Length: 3/16
Specifications
| Country of Origin | USA |
|---|---|
| Fastener Length | 0.178 inches minimum and 0.198 inches maximum |
| Head Angle | 100 ? |
| Head Style | Headless (setscrew) |
| Industry Standards/Certification | AN507 |
| Internal Drive Style | Hexagon |
| Length | 3/16 |
| Locking Feature | Patch threads or pellet threads or strip threads |
| Material | CRES |
| Material Specification | 66 fed std all material responses |
| Nondefinitive Specification/Std Data | 1 type and 4 style |
| Point Style | Cup |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| 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 |
| Weight | 0.0002 lb |
| Width Across Flats | 0.050 |
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
- AN565BC4H3 AN #4-40 · 3/16 in · Headless (setscrew) · CRES
- MS51038-102 MS #4-40 · 3/16 in · Headless (setscrew) · CRES
- MS51963-211 MS #4-40 · 3/16 in · Headless (setscrew) · Steel
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Catalog data updated 2026-07-05. Report a data error