screws › machine screws
NAS1802-4-17
Machine Screw
Description
Fastener Length: 1-5/64", Thread: 1/4-28, Thread Length: 63/64, NAS1802 series screw
Specifications
| Fastener Length | Between 1.046 inches and 1.093 inches |
|---|---|
| Head Height | Between 0.125 inches and 0.140 inches |
| Head Style | Hexagon Head |
| Internal Drive Style | Cross recess type 1 |
| Material | Iron |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Iron alloy 660 |
| Screw Material Specification | Ams 5731 assn standard single material response or ams 5737 assn standard single material response |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Specification Data | 80205-nas1802 professional/industrial association standard |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.982 inches and 1.061 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.367 inches and 0.376 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1802-4-17. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error