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NAS6304U20
Close Tolerance Bolt-Unplated
Description
Close Tolerance Bolt-Unplated
Specifications
| Country of Origin | USA |
|---|---|
| Fastener Length | Between 1.605 inches and 1.635 inches |
| Grip Diameter | Between 0.2490 inches and 0.2495 inches |
| Grip Length | Between 1.240 inches and 1.260 inches |
| Head Height | Between 0.125 inches and 0.140 inches |
| Head Style | Dished hexagon |
| Material | Iron |
| Material Specification | Ams 5731 assn standard single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas6304 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.345 inches and 0.395 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Weight | .005 lb |
| Width Between Flats | Between 0.429 inches and 0.439 inches |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS6204-20 NAS 1/4-28 · 1-5/8 in · Dished hexagon · Steel
- NAS6304-20 NAS 1/4-28 · 1-5/8 in · Dished hexagon · Iron
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Catalog data updated 2026-07-05. Report a data error