The Stud,locked in, cataloged under National Stock Number 5307-01-321-8783, 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21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-321-8783 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OVERALL |
| Surface Finish | 63.0 MICROINCHES BODY |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| 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 5640 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A582 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 | 0.970 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.375 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.500 INCHES STUD THREAD IN |
| Locking Feature | KEY INSERTS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 13 STUD THREAD |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Material | STEEL COMP 303 |
| Thread Series Designator | UNF 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 |
|---|---|
| MS51833C204-16 | 3/2 Design control — primary reference U.S. Government activity |
| MS51833C204-16 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-321-8783 is a Stud,locked in, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-01-321-8783: Surface Finish: 32.0 MICROINCHES OVERALL; Surface Finish: 63.0 MICROINCHES BODY; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; 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.