screws › machine screws
3M902C4-12A
Screw
Description
Fastener Length: 1-1/4", Thread: 1/4-28, Thread Length: 1/2"
Specifications
| Countersink Angle | 100.0 degrees |
|---|---|
| Fastener Length | 1.203 inches minimum and 1.250 inches maximum |
| Head Diameter | 0.502 inches minimum and 0.507 inches maximum |
| Head Height | 0.0582 inches minimum and 0.0602 inches maximum |
| Head Style | Flat countersunk undercut |
| Internal Drive Style | High-torque |
| Length | 1 1/4 |
| Material | Steel |
| Material Specification | Ams5629 assn std single material response |
| Shoulder Diameter | 0.2802 inches minimum first shoulder and 0.2807 inches maximum first shoulder |
| Shoulder Length | 0.680 inches minimum first shoulder and 0.702 inches maximum first shoulder |
| Shoulder Shape | Round first shoulder |
| Special Features | Furnished with one rubber o ring |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.443 inches minimum and 0.510 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.
- 3M902C4-5A
- 3M902C4-7A
- 3M902C4-8A
- 3M902C4-9A
- 3M902C4-10A
- 3M902C4-11A
- 3M902C4-12A
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.
- 3M902C4-10A Commercial 1/4-28 · 0.073 in · Flat countersunk undercut · Steel
- 3M902C4-11A Commercial 1/4-28 · 0.073 in · Flat countersunk undercut · Steel
- 3M902C4-9A Commercial 1/4-28 · 0.073 in · Flat countersunk undercut · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error