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NAS517-4-1
100°, Flush Head Screw
Description
NAS 517-4-1 Close Tolerance Flat Head Screw - 100 Degree
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Country of Origin | USA |
| Drive Style | Cross |
| Fastener Length | Between 0.516 inches and 0.561 inches |
| Finish | Cadmium per QQ-P-416 Type II Class 2 |
| Grip | .125 |
| Hardness Rating | Between 36.0 rockwell c and 40.0 rockwell c |
| Head Diameter | Between 0.452 inches and 0.510 inches |
| Head Style | Flat Head, Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | .531 Inch |
| Material | Steel |
| Material Specification | Mil-s-6050 military specification single material response or an-s-9 military standard single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 00-637-6949 |
| NSN | 5305-00-637-6949 |
| Size | 1/4-28 |
| Sold In | Per Package |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 cl 3 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.385 inches and 0.531 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Weight | 0.01 lb |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS517-4-1. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error