bolts › machine bolts
77720-9-56
Bolt
Description
Fastener Length: 4-15/64", Thread: 1/2-18, Thread Length: 3/4"
Specifications
| Fastener Length | 4.210 inches minimum and 4.240 inches maximum |
|---|---|
| Grip Diameter | 0.5610 inches minimum and 0.5615 inches maximum |
| Grip Length | 3.490 inches minimum and 3.510 inches maximum |
| Head Height | 0.318 inches minimum and 0.338 inches maximum |
| Head Style | Double hexagon |
| Length | 4 15/64 |
| Material | Steel |
| Min. Tensile Strength (psi) | 145000 pounds per square inch |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.562 |
| Thread Direction | Right-hand |
| Thread Length | 0.700 inches minimum and 0.750 inches maximum |
| Thread Qty | 18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series Designator | UNJF |
| Thread Size | 1/2 |
| Width Between Flats | 0.865 inches minimum and 0.877 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for 77720-9-56. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error