screws › machine screws
NAS1801-5-16
Machine Screw
Description
Fastener Length: 63/64", Thread: 5/16-24, Thread Length: 0-63/64
Specifications
| Fastener Length | Between 0.984 inches and 1.031 inches |
|---|---|
| Hardness Rating | Between 36.0 rockwell c and 40.0 rockwell c |
| Head Height | Between 0.156 inches and 0.171 inches |
| Head Style | Hexagon Head |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Steel comp 4340 and steel comp 8740 |
| Screw Material Specification | Mil-s-5000 military specification single material response and mil-s-6049 military specification single material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Cl 2 federal specification single treatment response type 2 qq-p-416 |
| Specification Data | 80205-nas1801 professional/industrial association standard |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.901 inches and 1.031 inches |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.429 inches and 0.439 inches |
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 NAS1801-5-16. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error