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NAS6604D43
Bolt
Description
Fastener Length: 3-1/8", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.924 inches minimum first hole and 2.944 inches maximum first hole |
|---|---|
| Fastener Length | 3.097 inches minimum and 3.125 inches maximum |
| Features Provided | Finished head |
| Grip Diameter | 0.248 inches minimum and 0.250 inches maximum |
| Grip Length | 2.678 inches minimum and 2.698 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Height | 0.125 inches minimum and 0.140 inches maximum |
| Head Style | Dished hexagon |
| Length | 3 1/8 |
| Material | Steel |
| Material Specification | Mil-s-5000,g43400 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or ams 6322,g87400 assn std 2nd material response |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Specification Data | 80205-nas6604 professional/industrial association standard |
| Surface Finish | 125.0 microinches first hole, 125.0 microinches grip, 125.0 microinches sides of head, 125.0 microinches top of head, 32.0 microinches bearing surface of head, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2,class 2 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.425 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.429 inches minimum and 0.439 inches maximum |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error