bolts › close tolerance bolts
NAS1581F5R7
Close Tolerance Bolt
Description
Fastener Length: 61/64", Thread: 1/4-24, Thread Length: 33/64
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Fastener Length | Between 0.924 inches and 0.954 inches |
| Grip Diameter | Between 0.3110 inches and 0.3120 inches |
| Grip Length | Between 0.428 inches and 0.448 inches |
| Hardness Rating | 36.0 rockwell c and 40.0 rockwell c |
| Head Diameter | Between 0.429 inches and 0.479 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| 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 | Cadmium and chromate |
| Surface Treatment Specification | Type 2 cl 2 federal specification single treatment response qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.476 inches and 0.526 inches |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1581F5R5
- NAS1581F5R6
- NAS1581F5R7
- NAS1581F5R9
- NAS1581F5R10
- NAS1581F5R21
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1581F5R7. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error