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NAS6604H1
Close Tolerance Bolt - Drilled Head
Description
Close Tolerance Bolt - Drilled Head
Specifications
| Alternate Part Number | NAS1304-1H |
|---|---|
| Country of Origin | USA |
| Fastener Length | Between 0.472 inches and 0.502 inches |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.052 inches and 0.072 inches |
| Hardness Rating | 36.0 rockwell c and 40.0 rockwell c |
| Head Height | Between 0.125 inches and 0.140 inches |
| Head Style | Dished hexagon |
| Hole Configuration Style | Hexagon corners |
| Hole Diameter | Between 0.046 inches and 0.056 inches |
| Hole Quantity | 3 |
| Hole Type | Drilled |
| Length | 1/2 |
| Material | Steel |
| 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 |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas6604 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 | Qq-p-416 type 2 class 2 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.400 inches and 0.450 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
| Weight | .008 lb |
| Width Between Flats | Between 0.429 inches and 0.439 inches |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS6604H1 — functionally equivalent.
- NAS1304-1H Listed alternate 1/4-28 · 29/64 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error