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MS51957-79
1/4-20 X 1/2 MS51957, Phil Pan Machine Screw Coarse Full Thread 300 Series S/S DFAR, MS51957-79
Description
Fastener Length: 1/2", Thread: 1/4-20, Thread Length: 1/2", MS51957 series screw
Specifications
| Country of Origin | USA |
|---|---|
| Diameter | 1/4 |
| Drive Style | Cross |
| Drive Type | Phillips |
| Fastener Length | 0.500 |
| Finish | Passivate |
| Full Size | 1/4-20 x 1/2 |
| Head Angle | 100 ? |
| 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 |
| Industry Standards/Certification | AN507 |
| Internal Drive Style | Cross recess type 1 |
| Length | 0.5, 1/2 |
| Material | CRES |
| Material Specification | 66 federal standard all material responses |
| MilspecPart | MS51957 |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Size | 1/4-20 |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Fraction | 1/4-20 |
| Thread Length | Between 0.400 inches and 0.500 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 |
| Weight | .15 lb |
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.
- MS35206-279 MS 1/4-20 · 1/2 in · Phillips Pan Head · Steel
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Catalog data updated 2026-07-05. Report a data error