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NAS6204-21D
Close Tolerance Bolt-Drilled Shank
Description
Close Tolerance Bolt-Drilled Shank
Specifications
| Alternate Part Number | NAS1104-21D |
|---|---|
| Country of Origin | USA |
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.487 inches minimum first hole and 1.537 inches maximum first hole |
| Drilling | Drilled Head |
| Fastener Length | 1.667 inches minimum and 1.697 inches maximum |
| Grip | 1.312 in, 1.313 |
| Grip Diameter | 0.2445 inches minimum and 0.2450 inches maximum |
| Grip Length | 1.302 inches minimum and 1.322 inches maximum |
| Grip Tolerance | ±0.010 in |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Height | 0.125 inches minimum and 0.140 inches maximum |
| Head Style | Dished hexagon |
| Head Type | Hexagon |
| Hole Configuration Style | Hexagon corners |
| Hole Diameter | 0.046 inches minimum and 0.056 inches maximum |
| Hole Quantity | 3 |
| Hole Type | Drilled |
| Industry Standards/Certification | NAS6204 |
| Length | 1 11/16, 1.682 in, 1.683 |
| Material | Steel |
| Material Specification | Mil-s-5000 mil spec single material response or mil-s-6049 mil spec single material response or ams6322 assn std single material response |
| Min. Tensile Strength (psi) | 180000 pounds per square inch |
| NIIN | 01-245-4068 |
| NSN | 5306-01-245-4068 |
| Obsolete PN | NAS1104-21 |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Single Shear Strength | 95000 pounds per square inch |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,type ii,class 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.370 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 0.2500-28, 1/4 |
| Weight | 0.0025 lb |
| Width Between Flats | 0.429 inches minimum and 0.439 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS6204-21D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error