screws › machine screws
NAS1801-5-20
Machine Screw
Description
Fastener Length: 1-9/32", Thread: 5/16-24, Thread Length: 1-3/16
Specifications
| Fastener Length | 1.234 inches minimum and 1.281 inches maximum |
|---|---|
| Head Height | 0.156 inches minimum and 0.171 inches maximum |
| Head Style | Hexagon Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 1 9/32 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Steel comp e4340 or steel comp 8740 |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416,ty2,cl2 fed spec single treatment response |
| Specification Data | 80205-nas1801 professional/industrial association standard |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 1.151 inches minimum and 1.198 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.429 inches minimum and 0.439 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1801-5-20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error