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NAS514P428-6
Machine Screw
Description
Fastener Length: 3/8", Thread: 1/4-28, Thread Length: 17/64", NAS514 series screw
Specifications
| Countersink Angle | 100.0 degrees |
|---|---|
| Fastener Length | 0.344 inches minimum and 0.375 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Diameter | 0.447 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Screw Material | Steel comp 4037 or steel comp 8630 |
| Screw Material Specification | Ams 6300 assn std 1st material response or mil-s-6050 mil spec 2nd material response |
| Screw Surface Treatment | Cadmium |
| Screw Surface Treatment Specification | Qq-p-416 ty1 cl 2 fed spec single treatment response |
| Specification Data | 80205-nas514 professional/industrial association standard |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.167 inches minimum and 0.269 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
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Catalog data updated 2026-07-05. Report a data error