The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-641-2302, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Southco Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-641-2302 |
| Primary Part Number | A5T21 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.201 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Material Document and Classification | SAE 2320 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.557 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Shank Neck Length | 0.330 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 1 STYLE AND A CLASS AND B CLASS AND 5 SIZE |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.311 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.511 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 |
| Part Number | Manufacturer |
|---|---|
| A5T21 PRIMARY | Southco Inc (USA) |
| 5L.3741.004.26 | Hensoldt Sensors Gmbh Div Seps (DEU) |
NSN 5325-00-641-2302 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-641-2302 has 2 manufacturer part numbers on file: A5T21 (Southco Inc), 5L.3741.004.26 (Hensoldt Sensors Gmbh Div Seps).
Key specifications for A5T21: Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Material Accommodated Thickness: 0.201 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 13 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.