screws › machine screws
3M925C4-12A
Screw
Description
Fastener Length: 1-15/64", Thread: 1/4-28, Thread Length: 31/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.204 inches minimum and 1.234 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.740 inches minimum and 0.760 inches maximum |
| Head Diameter | 0.502 inches minimum and 0.507 inches maximum |
| Head Height | 0.071 inches minimum and 0.073 inches maximum |
| Head Style | Flat countersunk undercut |
| Internal Drive Style | High-torque |
| Length | 1 15/64 |
| Material | Steel |
| Material Specification | Ams5629 assn std single material response |
| Special Features | Assembled with one o-ring per st7m251,fscm 76301; lubricated with cetyl alcohol |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Aluminum and chromate |
| Surface Treatment Specification | Mil-c-83488,type 2,class 3 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 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- HT8137-4-12AS Other 1/4-28 · 0.073 in · Flat countersunk undercut · Titanium
- ST3M430V4-12AS Other 1/4-28 · 0.073 in · Flat countersunk undercut · Titanium
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Catalog data updated 2026-07-05. Report a data error