screws › close tolerance screws
3M1312-4-5
Close Tolerance Screw
Description
Thread: 1/4-28, Thread Length: 19/64
Specifications
| Criticality Code Justification | Agav |
|---|---|
| End Application | Aft pylon 01-485-5688;f/a-18e/f firing |
| Grip Diameter | 0.249 |
| Grip Length | 0.438 |
| Material | Iron |
| Part Name Assigned By Controlling Agency | Aircraft close tolerance (inavy)screw |
| Special Features | 95ksi shear;not intended for use in structural applications;use with retaining ring 3m1239 & self-locking plate nut a286cres gear drive recess 100deg reduced head fastner-captive |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.312 |
| 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 |
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.
- CA22033-4-10-12 Other 1/4-28 · Iron
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Catalog data updated 2026-07-05. Report a data error