bolts › machine bolts
C7985-4-8
Bolt
Description
Fastener Length: 29/32", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.888 inches minimum and 0.918 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.490 inches minimum and 0.510 inches maximum |
| Hardness Rating | 46.0 rockwell c minimum and 49.0 rockwell c maximum |
| Head Diameter | 0.350 inches minimum and 0.399 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 29/32 |
| Material | Steel |
| Material Specification | Ams 6487 assn std single material response |
| Min. Tensile Strength (psi) | 220000 pounds per square inch |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Nas 672 assn std single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.378 inches minimum and 0.428 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- C7985-4-5
- C7985-4-6
- C7985-4-6R
- C7985-4-7R
- C7985-4-8
- C7985-4-9
- C7985-4-15
Cross-reference
No interchangeable or dimensionally similar parts are on record for C7985-4-8. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error