The Stud,positive Lock, cataloged under National Stock Number 5325-01-101-5621, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5325-01-101-5621 |
| Item Name | Stud,positive Lock |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Undercut Length | 0.012 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN |
| Undercut Diameter | 0.146 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN |
| Positive Lock Stud Shank Style | STUD SHANK |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Major Diameter Length | 0.152 INCHES MINIMUM AND 0.153 INCHES MAXIMUM IN |
| Shoulder Height | 0.032 INCHES NOMINAL IN |
| Stud Shank Hole Depth | 0.078 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A582 NATIONAL SPEC 1ST MATERIAL RESPONSE OR UNS S30300 ASSN STD 1ST MATERIAL RESPONSE OR COM+303PB ASSN STD 2ND MATERIAL RESPONSE OR QQ-S-764,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL |
| End Overall Length | 0.396 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Stud Shank Hole Diameter | 0.116 INCHES NOMINAL IN |
| Material | STEEL COMP 303 OR STEEL COMP 303PB OVERALL |
| Stud Shank Overall Height | 0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN |
| Positive Lock Stud Head Style | STUD HEAD |
| Head Diameter | 0.156 INCHES NOMINAL IN |
| Shank Major Diameter | 0.144 INCHES MINIMUM AND 0.146 INCHES MAXIMUM 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 |
|---|---|
| SM-B-447106 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-101-5621 is a Stud,positive Lock, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-101-5621: Undercut Length: 0.012 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN; Undercut Diameter: 0.146 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN; Positive Lock Stud Shank Style: STUD SHANK; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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.