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NAS1604-3R
Screw
Description
Fastener Length: 43/64", Thread: 1/4-28, Thread Length: 31/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.642 inches minimum and 0.672 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.464 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 43/64 |
| Material | Steel |
| Material Specification | Mil-s-5000 mil spec 1st material response or mil-s-6049 mil spec 1st material response or mil-s-6098 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-5626 mil spec 4th material response or ams 6300 assn std 5th material response or mil-s-6758 mil spec 6th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Shoulder Diameter | 0.2797 inches minimum first shoulder and 0.2807 inches maximum first shoulder |
| Shoulder Length | 0.178 inches minimum first shoulder and 0.198 inches maximum first shoulder |
| Shoulder Shape | Round first shoulder |
| Specification Data | 80205-nas1604 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.444 inches minimum and 0.494 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1604-3R. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error