The Stud,self-Locking, cataloged under National Stock Number 5307-01-625-1956, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-625-1956 |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Surface Treatment Document and Classification | STM A 380 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SELF-LOCKING |
| Material Document and Classification | ASTM A 582/A 582M NATIONAL STD/SPEC ALL MATERIAL RESPONSES |
| Nominal Thread Size | 0.313 INCHES STUD THREAD IN |
| Head Length | 0.150 INCHES NOMINAL IN |
| Locking Feature | SELF-CLINCHING HEAD |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Material | STEEL COMP 303 AND STEEL COMP 303SE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Head Diameter | 0.376 INCHES NOMINAL IN |
| 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 |
|---|---|
| M63540/1-55C | 3/2 Design control — primary reference U.S. Government activity |
NSN 5307-01-625-1956 is a Stud,self-Locking, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-01-625-1956: Surface Treatment Document and Classification: STM A 380 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SELF-LOCKING; Material Document and Classification: ASTM A 582/A 582M NATIONAL STD/SPEC ALL MATERIAL RESPONSES; Overall Length: 1.250 INCHES NOMINAL IN. 12 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.