The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-431-3182, 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 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-431-3182 |
| Primary Part Number | 2501-20-23-C3Y |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.201 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Diameter | 0.557 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Shank Neck Length | 0.365 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.520 INCHES MINIMUM AND 0.540 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 |
|---|---|
| 50-005A23 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| 2501-20-23-C3Y PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| A5T23CBY | 3/9 Design control — primary reference Southco Inc |
| 50-005A23 | 5/2 Secondary reference U.S. Government activity |
NSN 5325-01-431-3182 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-431-3182 has 2 manufacturer part numbers on file: 50-005A23 (Leonardo Spa Helicopters Division - Production Site), 2501-20-23-C3Y (Southco Inc).
Key specifications for 2501-20-23-C3Y: Surface Treatment Document and Classification: QQ-P-416,TY 2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Material Accommodated Thickness: 0.201 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 11 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.