screws › socket head cap screws
NAS1351N3-20
NAS Screws
Description
NAS Screws
Specifications
| Country of Origin | USA |
|---|---|
| Fastener Length | 1.210 inches minimum and 1.250 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 45.0 rockwell c 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 |
| Hole Configuration Style | Round internal hexagon |
| Hole Diameter | 0.044 inches minimum and 0.050 inches maximum |
| Hole Quantity | 6 |
| Hole Type | Drilled |
| 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 |
| Sold In | Per Package |
| 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 inches minimum |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNRF |
| Weight | .005 lb |
| Width Across Flats | 0.1562 inches minimum and 0.1587 inches maximum |
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 NAS1351N3-20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error