The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-398-3733, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-398-3733 |
| Primary Part Number | GS520B7-42 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TY1, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.391 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Diameter | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Shank Neck Length | 0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Securing Device Type | GROMMET |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.640 INCHES MINIMUM AND 0.660 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 |
| Part Number | Manufacturer |
|---|---|
| GS520B7-42 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A35T42 | 3/9 Design control — primary reference Southco Inc |
NSN 5325-01-398-3733 is a Stud,turnlock Fastener, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-398-3733 has 1 manufacturer part number on file: GS520B7-42 (Northrop Grumman Systems Corporation).
Key specifications for GS520B7-42: Surface Treatment Document and Classification: QQ-P-416, TY1, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Material Accommodated Thickness: 0.391 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 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.