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MS51957-15B
4-40X3/8 MS51957-B Phil Pan M/S Coarse Full Thread 300 Series S/S DFAR Black Ox
Description
Pan Head Machine Screw
Specifications
| Color | Black |
|---|---|
| Country of Origin | USA |
| Diameter | #4 |
| Drive | Phillips |
| Drive Style | Phillips |
| Drive Type | Phillips |
| Fastener Length | Between 0.344 inches and 0.375 inches |
| Finish | Black Oxide Coating |
| Full Size | #4-40 x 3/8 |
| Head Angle | 100 ? |
| Head Diameter | Between 0.205 inches and 0.219 inches |
| Head Height | Between 0.070 inches and 0.080 inches |
| Head Style | Pan Head |
| Head Type | Pan |
| Industry Standards/Certification | MS51957 |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 in |
| Material | CRES |
| MilspecPart | MS51957-B |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| NIIN | 00-242-7275 |
| NSN | 5305-00-242-7275 |
| Nondefinitive Specification/Std Data | 3 type and 9c style |
| Screw Material | Stainless steel or steel |
| Screw Material Specification | 300 series federal standard 1st material response or comp 16-18 or 18-8 assn standard 2nd material response 300 series federal specification 1st material response or 66 qq-s-763 |
| Screw Surface Treatment | Oxide |
| Screw Surface Treatment Specification | Cl 4 military specification single treatment response mil-c-13924 |
| Size | 4-40 |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.294 inches and 0.375 inches |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 4-40 |
| Thread Type | Coarse Thread, UNC |
| Threads Per Inch | 40 |
| U.O.M. | Imperial |
| Weight | 0.001 lb |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error