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NAS1801-4-19
Machine Screw
Description
hex head, cadmium steel
Specifications
| Bearing Surface Of Head Surface Finish | 63.0 microinches |
|---|---|
| Drive Style | Cross |
| Fastener Length | Between 1.1715 inches and 1.2175 inches |
| Head Height | Between 0.125 inches and 0.140 inches |
| Head Style | Hexagon Head |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Material Specification | Ams6382 national specification 1st material response or ams6415 or 6484 national specification 2nd material response or ams6322 national specification 3rd material response |
| Part Name Assigned By Controlling Agency | 160 ksi ftu alloy steel full thread cruciform recess hex head screw |
| Specification Data | 80205-nas1801 professional/industrial association standard |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Class 2 federal specification single treatment response type ii qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.2500 |
| Thread Direction | Right-hand |
| Thread Length | Between 1.1715 inches and 1.2175 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 |
| Thread Surface Finish | 32.0 microinches |
| Width Between Flats | Between 0.367 inches and 0.376 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1801-4-19. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error