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NAS1503-3
Machine Screw
Description
Machine Screw
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.449 inches minimum and 0.479 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 42.0 rockwell c maximum |
| Head Diameter | 0.328 inches minimum and 0.385 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | High-torque |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Steel comp e4340 or steel comp 4340 or steel comp 8740 or steel comp 8735 or steel comp 6150 or steel comp 4140 |
| Screw Material Specification | Mil-s-5000 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-8503 mil spec 5th material response or mil-s-5626 mil spec 6th material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416,ty2 cl3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.271 inches minimum and 0.281 inches maximum |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNF |
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 NAS1503-3. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error