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20-057-4-24D
Bolt
Description
Fastener Length: 1-59/64", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.747 inches nominal first hole |
|---|---|
| Fastener Length | 1.925 |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 1.500 |
| 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 | Hexagon Head |
| Length | 1 59/64 |
| Material | Steel |
| Material Specification | Mil-b-7838 mil spec single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,type 2,class 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.425 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.430 inches minimum and 0.439 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- 20-057-4-14D
- 20-057-4-15D
- 20-057-4-24D
- 20-057-4-81D
Cross-reference
No interchangeable or dimensionally similar parts are on record for 20-057-4-24D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error