bolts › machine bolts
NAS428HK4A20
Bolt
Description
Fastener Length: 2-", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 1-61/64"
Specifications
| Fastener Length | 2.000 |
|---|---|
| Grip Length | 0.031 inches minimum and 0.062 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.141 |
| Head Style | Crowned hexagon |
| Hole Configuration Style | Hexagon flats |
| Hole Diameter | 0.046 |
| Hole Quantity | 1 |
| Hole Type | Drilled |
| Material | Steel |
| Material Specification | Qq-p-416,ty 2,cl 3 fed spec single material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Part Name Assigned By Controlling Agency | Bolt,machine |
| Surface Treatment | Cadmium and chromate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.954 |
| 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.
- NAS428HK4A5
- NAS428HK4A6
- NAS428HK4A11
- NAS428HK4A12
- NAS428HK4A13
- NAS428HK4A14
- NAS428HK4A20
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS428HK4A20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error