bolts › shear bolts
NAS1581C3T3
Flush Reduced Head Bolt
Description
Flush Reduced Head Bolt
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Country of Origin | USA |
| Fastener Length | 0.534 inches minimum and 0.564 inches maximum |
| Finish | Passivate Per Ams 2700 |
| Grip | 0.187 |
| Grip Diameter | 0.1890 inches minimum and 0.1895 inches maximum |
| Grip Length | 0.177 inches minimum and 0.197 inches maximum |
| Head Diameter | 0.258 inches minimum and 0.305 inches maximum |
| Head Style | Flat countersunk |
| Heat Treat | 160,000 - 190,000 PSI |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 0.549, 9/16 |
| Material | Iron |
| Material Specification | Ams 5731 or ams 5732 or ams 5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 01-054-5957 |
| NSN | 5305-01-054-5957 |
| 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 | .004 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
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Catalog data updated 2026-07-05. Report a data error