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NAS514P440-8B
Machine Screw
Description
Fastener Length: 1/2", Thread: 4-40, Thread Length: 1/2
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.500 |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Diameter | 0.183 inches minimum and 0.225 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/2 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Screw Material | Steel comp 8630 |
| Screw Material Specification | Mil-s-6050 mil spec single material response or an-s-9 mil std single material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec 1st treatment response and bulletin 65-8-cd assn std 1st treatment response and qq-p-416 ty 2 cl 3 fed spec 2nd treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.500 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS24693C6 MS #4-40 · 1/2 in · Flat countersunk · CRES
- NAS1102-04-8 NAS #4-40 · 1/2 in · Flat countersunk · Steel
- NAS514P440-8 NAS #4-40 · 1/2 in · Flat countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error