The Stud,locked in, cataloged under National Stock Number 5307-01-278-2075, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-278-2075 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES STUD THD |
| Surface Finish | 32.0 MICROINCHES NUT THD |
| Surface Finish | 63.0 MICROINCHES SHANK |
| Thread Length | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.610 INCHES MINIMUM AND 0.670 INCHES MAXIMUM NUT THREAD IN |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Distance From End of Stud End Threads to Nut End | 0.782 INCHES MINIMUM AND 0.842 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.375 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.562 INCHES STUD THREAD IN |
| Locking Feature | KEY INSERTS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 12 STUD THREAD |
| Thread Quantity Per Inch | 16 NUT THREAD |
| Material | IRON ALLOY 660 |
| Thread Series Designator | UNJC NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS51834A105-13 | 5/1 Secondary reference U.S. Government activity |
| NASM51834 | 3/2 Design control — primary reference U.S. Government activity |
| MS51834A105-13 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-278-2075 is a Stud,locked in, classified under FSC 5307, Studs. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5307-01-663-1319, 5307-01-663-1322, 5307-01-663-1340. Verify interchangeability with system specifications before substitution.
Key specifications for 5307-01-278-2075: Surface Finish: 63.0 MICROINCHES STUD THD; Surface Finish: 32.0 MICROINCHES NUT THD; Surface Finish: 63.0 MICROINCHES SHANK; Thread Length: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM STUD THREAD IN. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.