screws › machine screws
NAS1621-4
Screw
Description
Fastener Length: 17/32", Thread: 6-32, Thread Length: 19/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.511 inches minimum and 0.541 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.231 inches minimum and 0.279 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Torque set |
| Length | 17/32 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Steel comp e4340 or steel comp 4037 |
| Screw Material Specification | Mil-s-5000 mil spec 1st material response or ams 6300 assn std 2nd material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec all treatment responses |
| Thread Class | 2a |
| Thread Diameter | 0.138 |
| Thread Direction | Right-hand |
| Thread Length | 0.251 inches minimum and 0.301 inches maximum |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNJC |
| Thread Size | 6 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1621-4
- NAS1621-6
- NAS1621-8
- NAS1621-11
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1621-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error