The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-281-5057, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-281-5057 |
| Primary Part Number | 2601-20-26-C3C |
| 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,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Accommodated Thickness | 0.231 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Diameter | 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Shank Neck Length | 0.430 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 1 STYLE AND A CLASS AND B CLASS AND 7 SIZE |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.369 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.620 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 |
|---|---|
| 2601-20-26-C3C PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| 12356904 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
| A6T26IY | 5/9 Secondary reference Southco Inc |
| A6T26 | 5/9 Secondary reference Southco Inc |
NSN 5325-00-281-5057 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-281-5057 has 1 manufacturer part number on file: 2601-20-26-C3C (Southco Inc).
Key specifications for 2601-20-26-C3C: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Accommodated Thickness: 0.231 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK; Diameter: 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN. 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.