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NAS1801-5-25
Machine Screw
Description
Fastener Length: 1-1/2", Thread: 5/16-24, Thread Length: 1-9/16", NAS1801 series screw
Specifications
| Bearing Surface Of Head Surface Finish | 63.0 microinches |
|---|---|
| Fastener Length | 1.562 |
| Head Height | Between 0.156 inches and 0.171 inches |
| Head Style | Dished hexagon |
| Internal Drive Style | Cross recess type 1 |
| Length | 1 1/2 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Steel comp e4340 or steel comp 8740 |
| Screw Material Specification | Mil-s-5000 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams6322 assn standard 2nd material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416 type 2 class 2 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | Between 1.479 inches and 1.562 inches |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Thread Surface Finish | 32.0 microinches |
| 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 NAS1801-5-25. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error