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NAS564-21
Machine Bolt
Description
Fastener Length: 5/8", Hole Diameter: 1/16", Thread: 1/4-28, Thread Length: 5/8
Specifications
| Fastener Length | 0.656 |
|---|---|
| Features Provided | Finished head |
| Grip Length | 0.030 inches minimum and 0.060 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Height | 0.219 |
| Head Style | Hexagon Head |
| Hole Configuration Style | Hexagon longitudinal hole |
| Hole Diameter | 0.070 |
| Hole Quantity | 6 |
| Hole Type | Drilled |
| Length | 5/8 |
| Material | Steel |
| Material Specification | Ams 6300 assn std 1st material response or mil-s-6758 mil spec 2nd material response or mil-s-6050 mil spec 3rd material response or mill-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response or mil-s-5626 mil spec 6th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.596 inches minimum and 0.626 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.438 |
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 NAS564-21. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error