bolts › close tolerance bolts
NAS1581F8T11
Bolt
Description
Fastener Length: 1-15/32", Thread: 1/2-20, Thread Length: 49/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.441 inches minimum and 1.471 inches maximum |
| Grip Diameter | 0.4985 inches minimum and 0.4995 inches maximum |
| Grip Length | 0.678 inches minimum and 0.698 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.6901 inches minimum and 0.7611 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 1 15/32 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Part Name Assigned By Controlling Agency | Bolt, shear, 100 degree flush reduced head, offset cruciform, 95 ksi fsu |
| Specification Data | 80205-nas1581 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416, ty 2, cl 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.500 |
| Thread Direction | Right-hand |
| Thread Length | 0.763 inches minimum and 0.773 inches maximum |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series Designator | UNJF |
| Thread Size | 1/2 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1581F8T11
- NAS1581F8T13
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1581F8T11. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error