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NAS6605D21
Close Tolerance Bolt - Drilled Shank
Description
Close Tolerance Bolt - Drilled Shank
Specifications
| Alternate Part Number | NAS1305-21D |
|---|---|
| Country of Origin | USA |
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.600 inches first hole |
| Fastener Length | Between 1.766 inches and 1.796 inches |
| Grip Diameter | Between 0.3110 inches and 0.3120 inches |
| Grip Length | Between 1.302 inches and 1.322 inches |
| Hardness Rating | 36.0 rockwell c and 40.0 rockwell c |
| Head Height | Between 0.156 inches and 0.171 inches |
| Head Style | Dished hexagon |
| Material | Steel |
| Material Specification | Mil-s-5000 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams6322 assn standard 2nd material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 01-332-2165 |
| NSN | 5306-01-332-2165 |
| Shank Unthreaded Hole Diameter | 0.076 inches first hole and 0.086 inches first hole |
| Specification Data | 80205-nas6605 professional/industrial association standard |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 2 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.469 |
| 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 |
| Weight | 0.045 lb |
| Width Between Flats | Between 0.492 inches and 0.502 inches |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS6605D21 — functionally equivalent.
- NAS1305-21D Listed alternate 1/4-24 · 0.073 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error