screws › close tolerance screws
3M925C4-6A
Close Tolerance Screw
Description
Fastener Length: 55/64", Thread: 1/4-28, Thread Length: 31/64
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Fastener Length | Between 0.829 inches and 0.859 inches |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.365 inches and 0.385 inches |
| Head Diameter | Between 0.5018 inches and 0.5066 inches |
| Head Height | Between 0.0713 inches and 0.0733 inches |
| Head Style | Flat countersunk undercut |
| Internal Drive Style | High-torque |
| Material | Steel |
| Material Specification | Ams 5629 assn standard single material response |
| Special Features | Furnished with one o ring |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Aluminum and chromate |
| Surface Treatment Specification | Mil-c-83488 type 2 cl 3 military specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.444 inches and 0.494 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- 3M925C4-6A
- 3M925C4-6D
Cross-reference
No interchangeable or dimensionally similar parts are on record for 3M925C4-6A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error