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NAS6204-28D
Close Tolerance Bolt-Drilled Shank
Description
Close Tolerance Bolt-Drilled Shank
Specifications
| Alternate Part Number | NAS1104-28D |
|---|---|
| Country of Origin | USA |
| Drilling | Drilled Head |
| Fastener Length | Between 2.105 inches and 2.135 inches |
| Grip | 1.750 in |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 1.740 inches and 1.760 inches |
| Grip Tolerance | ±0.010 in |
| 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 |
| Head Type | Hexagon |
| Industry Standards/Certification | NAS6204 |
| Length | 2 1/8, 2.120 in |
| 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 |
| NIIN | 01-256-4453 |
| NSN | 5306-01-256-4453 |
| Shank Unthreaded Hole Diameter | 0.076 inches first hole and 0.086 inches first hole |
| Specification Data | 80205-nas6204 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip, 32.0 microinches surface of head, 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 0.345 inches and 0.395 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 | 0.2500-28, 1/4 |
| Weight | 0.0035 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 NAS6204-28D — functionally equivalent.
- NAS1104-28D Listed alternate 1/4-28 · 0.086 in · Dished hexagon · Steel
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS6204-28 NAS 28.00-28 · 0.086 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error