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MS51957-77
1/4-20X3/8 MS51957, Phil Pan Machine Screw Coarse Full Thread 300 Series S/S DFAR, MS51957-77
Description
Fastener Length: 3/8", Thread: 1/4-20, Thread Length: 9/32", MS51957 series screw
Specifications
| Diameter | 1/4 |
|---|---|
| Drive Type | Phillips |
| Fastener Length | 0.375 |
| Finish | Passivate |
| Full Size | 1/4-20 x 3/8 |
| Head Diameter | Between 0.473 inches and 0.492 inches |
| Head Height | Between 0.162 inches and 0.175 inches |
| Head Style | Phillips Pan Head |
| Head Type | Pan |
| Internal Drive Style | Cross recess type 1 |
| Length | 0.375, 3/8 |
| Material | CRES |
| MilspecPart | MS51957 |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Screw Material | Steel comp |
| Screw Material Specification | 66 federal standard all material responses |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Size | 1/4-20 |
| Thread Class | 2a |
| Thread Diameter | 0.25 |
| Thread Direction | Right-hand |
| Thread Fraction | 1/4-20 |
| Thread Length | Between 0.275 inches and 0.375 inches |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 1/4 |
| Thread Type | N.C. - Coarse, UNC-2A |
| Threads Per Inch | 20 |
| U.O.M. | Imperial |
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.
- MS35206-277 MS 1/4-20 · 3/8 in · Phillips Pan Head · Steel
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Catalog data updated 2026-07-05. Report a data error