bolts › machine bolts
HT4057-4-8A
Bolt
Description
Fastener Length: 63/64", Thread: 1/4-28, Thread Length: 31/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.954 inches minimum and 0.984 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.490 inches minimum and 0.510 inches maximum |
| Head Diameter | 0.456 inches minimum and 0.508 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | High-torque |
| Length | 63/64 |
| Material | Steel |
| Material Specification | Ams 5629 assn std single material response |
| Special Features | Cetyl alcohol lubrication |
| Surface Treatment | Aluminum |
| Surface Treatment Specification | Mil-c-83488 mil spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.444 inches minimum and 0.494 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for HT4057-4-8A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error