screws › machine screws
NAS1801-04-11
Machine Screw
Description
Fastener Length: 13/16", Thread: 4-40, Thread Length: 13/16
Specifications
| Fastener Length | Between 0.771 inches and 0.818 inches |
|---|---|
| Head Height | Between 0.049 inches and 0.060 inches |
| Head Style | Dished hexagon |
| 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 1st material response and mil-6049 military specification 2nd 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 | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.721 inches and 0.818 inches |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNJC |
| Thread Size | 4 |
| Width Between Flats | Between 0.181 inches and 0.189 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 NAS1801-04-11. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error