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NAS1081-4D5
Setscrew
Description
Fastener Length: 5/16", Thread: 1/4-28, Head Width: 1/8", Thread Length: 5/16
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | Between 0.302 inches and 0.322 inches |
| Hardness Rating | 45.0 rockwell c and 53.0 rockwell c |
| Head Style | Headless (setscrew) |
| Internal Drive Style | Hexagon |
| Locking Feature | Patch threads or pellet threads or strip threads |
| Material | Steel |
| Material Specification | 66 federal standard all material responses |
| Nondefinitive Specification/Std Data | 1 type and 4 style |
| Point Style | Cup |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.302 inches and 0.322 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Width Across Flats | 0.125 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1081-4D4
- NAS1081-4D5
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.
- NAS1081C4A5 NAS 21/64 in · Headless (setscrew) · CRES
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error