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| Specifications | |
|---|---|
| Thread Class | 3A |
| Thread Direction | Right-hand |
| Thread Length | 0.400 inches minimum, 0.450 inches maximum |
| Fastener Length | 1.410 inches minimum, 1.440 inches maximum |
| Head Style | Dished hexagon |
| Head Height | 0.125 inches minimum, 0.140 inches maximum |
| Width Between Flats | 0.429 inches minimum, 0.439 inches maximum |
| Grip Diameter | 0.2485 inches minimum, 0.2495 inches maximum |
| Shank Unthreaded Hole Diameter | 0.076 inches first hole, 0.086 inches first hole |
| Thread Diameter | 0.250 inches |
| Grip Length | 0.990 inches minimum, 1.010 inches maximum |
| Thread Qty Per Inch (TPI) | 28 |
| Min. Tensile Strength | 160,000 psi |
| Hardness Rating | 36.0 Rockwell C minimum, 40.0 Rockwell C maximum |
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.222 inches first hole, 1.272 inches first hole |
| Surface Finish – Bearing Surface of Head | 32.0 microinches |
| Surface Finish – Grip | 32.0 microinches |
| Surface Finish – Threads | 32.0 microinches |
| Material | Steel comp E4340 or 8740 |
| Material Specification | MIL-S-5000 military specification (1st material response) or MIL-S-6049 military specification (2nd material response) or AMS 6322 ASSN standard (2nd material response) |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | QQ-P-416, Type 2 Cl 2 Federal Specification, single treatment response |
| Thread Series Designator | UNJF |
| Specification Data | 80205-NAS6604 professional/industrial association standard |
| NSN | 5306-01-200-2066 |
| Part Number | NAS1304-16D |
| Description | Bolt, shear |
