screws › socket head cap screws
NAS1351N3-28
Socket Head Cap Screw
Description
Screw
Specifications
| Fastener Length | 1.710 inches minimum and 1.750 inches maximum |
|---|---|
| Head Diameter | 0.303 inches minimum and 0.312 inches maximum |
| Head Height | 0.185 inches minimum and 0.190 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Material | Iron |
| Material Specification | Ams5731 assn std single material response or ams5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas1351 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.875 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNRF |
| Width Across Flats | 0.156 inches minimum and 0.159 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- NAS1351-3-28P NAS 1-3/4 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error