screws › machine screws
MS51957-21
4-40 X 1 MS51957, Phil Pan Machine Screw Coarse Full Thread 300 Series S/S DFAR, MS51957-21
Description
MS 51957-21 Phillips Pan Head Machine Screw
Specifications
| Alternate Part Number | AN515C4R16 |
|---|---|
| Country of Origin | USA |
| Diameter | #4 |
| Drive Style | Phillips |
| Drive Type | Phillips |
| Finish | Passivate |
| Full Size | #4-40 x 1 |
| Head Angle | 100 ? |
| Head Style | Phillips Pan Head |
| Head Type | Pan |
| Industry Standards/Certification | MS51957 |
| Length | 1 |
| Material | CRES |
| MilspecPart | MS51957 |
| NIIN | 00-054-5655 |
| NSN | 5305-00-054-5655 |
| Size | 4-40 |
| Thread Fraction | 4-40 |
| Thread Size | 4-40 |
| Thread Type | N.C. - Coarse, UNC-2A |
| Threads Per Inch | 40 |
| U.O.M. | Imperial |
| Weight | 0.002 lb |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS51957-21 — functionally equivalent.
- AN515C-4-R16 Listed alternate 0.073 in · Phillips Recess Head · CRES
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error