The Stud,self-Locking, cataloged under National Stock Number 5307-01-422-8257, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5307-01-422-8257 |
| Item Name | Stud,self-Locking |
| FSC / FSG | 5307 / 53 — Studs |
| Status | ACTIVE |
| Thread Length | 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Style Designator | SELF-LOCKING |
| Material Document and Classification | ASTM A380 ASSN STD ALL MATERIAL RESPONSES |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.138 INCHES LOCATION NOT OTHERWISE SPECIFIED IN |
| Head Length | 0.082 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN |
| Locking Feature | HEAD DISTORTIONS |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A LOCATION NOT OTHERWISE SPECIFIED A |
| Thread Quantity Per Inch | 32 LOCATION NOT OTHERWISE SPECIFIED |
| Material | STEEL COMP 303 AND STEEL COMP 303SE |
| Distance Across Flats | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED |
| Head Diameter | 0.199 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 |
|---|---|
| MIL-S-63540/3 | 4/1 Identification reference U.S. Government activity |
| M63540/3-16-9 | 2/2 Government specification standardization U.S. Government activity |
NSN 5307-01-422-8257 is a Stud,self-Locking, classified under FSC 5307, Studs. Status: active.
Key specifications for 5307-01-422-8257: Thread Length: 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN; Style Designator: SELF-LOCKING; Material Document and Classification: ASTM A380 ASSN STD ALL MATERIAL RESPONSES; Overall Length: 0.563 INCHES NOMINAL IN. 14 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.