bolts › close tolerance bolts
NAS1271H3
Bolt
Description
Fastener Length: 43/64", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 1/2"
Specifications
| Extended Washer Diameter | 0.360 |
|---|---|
| Extended Washer Thickness | 0.059 inches minimum and 0.079 inches maximum |
| Fastener Length | 0.663 inches minimum and 0.683 inches maximum |
| Features Provided | Finished head |
| Grip Length | 0.178 inches minimum and 0.198 inches maximum |
| Head Height | 0.290 inches minimum and 0.310 inches maximum |
| Head Style | Double hexagon extended washer |
| Hole Configuration Style | Double hexagon longitudinal hole |
| Hole Diameter | 0.032 inches minimum and 0.042 inches maximum |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Length | 43/64 |
| Material | Titanium |
| Material Specification | Nas 621 assn std single material response |
| Specification Data | 80205-nas1271 professional/industrial association standard |
| Surface Finish | 16.0 microinches threads, 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.465 inches minimum and 0.505 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.306 inches minimum and 0.315 inches maximum |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error