screws › close tolerance screws
C7984L4-11
Screw
Description
Thread: 1/4-28, Thread Length: 1/2"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.043 inches minimum and 1.073 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.678 inches minimum and 0.698 inches maximum |
| Hardness Rating | 46.0 rockwell c minimum and 49.0 rockwell c maximum |
| Head Diameter | 0.447 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 1 1/16 |
| Material | Steel |
| Material Specification | Ams6487 assn std single material response |
| Min. Tensile Strength (psi) | 220000 pounds per square inch |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| 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 | 0.491 inches minimum and 0.511 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 C7984L4-11. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error