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NAS624-20
1.735 Inch Total Length NAS624 Hexagon Socket Head External Wrenching Bolt
Description
1.735 Inch Total Length NAS624 Hexagon Socket Head External Wrenching Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Extended Washer Diameter | Between 0.428 inches and 0.438 inches |
| Extended Washer Thickness | Between 0.059 inches and 0.079 inches |
| Fastener Length | Between 1.720 inches and 1.750 inches |
| Features | External Wrenching |
| Grip | 1.250 in |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 1.240 inches and 1.260 inches |
| Hardness Rating | 39.0 rockwell c and 43.0 rockwell c |
| Head Height | Between 0.290 inches and 0.310 inches |
| Head Style | Double hexagon w/hole |
| Head Type | 12 Point Hexagon |
| Industry Standards/Certification | NAS624 |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-8503 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6049 military specification 5th material response |
| Min. Tensile Strength (psi) | 180000 pounds per square inch |
| Pressure | 180000 psi |
| Specification Data | 80205-nas624 professional/industrial association standard |
| Suggested Nuts for the Bolts | 42FLW |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Nas 672 assn standard single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.460 inches and 0.510 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 |
| Total Length | 1.735 in |
| Weight | .005 lb |
| Width Between Flats | Between 0.306 inches and 0.315 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS624-20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error