screws › close tolerance screws
NAS1581C3R2
Close Tolerance Screw
Description
Flush Reduced Head Bolt
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Country of Origin | USA |
| Fastener Length | 0.472 inches minimum and 0.502 inches maximum |
| Grip Diameter | 0.1885 inches minimum and 0.1895 inches maximum |
| Grip Length | 0.115 inches minimum and 0.135 inches maximum |
| Head Diameter | 0.258 inches minimum and 0.305 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 1/2 |
| Material | Iron |
| Material Specification | Ams5731 assn std single material response or ams5732 assn std single material response or ams 5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 01-180-8696 |
| NSN | 5305-01-180-8696 |
| Special Features | Internal drive ribbed |
| Specification Data | 80205-nas1581 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| 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 | 0.337 inches minimum and 0.387 inches maximum |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNJF |
| Thread Size | 10 |
| Weight | 0.0035 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1581C3R2
- NAS1581C3R2P
- NAS1581C3R3
- NAS1581C3R4
- NAS1581C3R4P
- NAS1581C3R6P
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1581C3R2. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error