The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-430-1820, 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 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-430-1820 |
| Primary Part Number | 2351-20-51D-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 1 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Head Length | 0.875 INCHES NOMINAL IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Stud Head Height | 0.880 INCHES NOMINAL IN |
| Shank Neck Length | 0.680 INCHES NOMINAL IN |
| Turnlock Stud Head Style | FILLISTER WING |
| Stud Shank Major Diameter | 0.217 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.481 INCHES MINIMUM AND 0.510 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 |
|---|---|
| 2351-20-51D-C3Y PRIMARY | Southco Inc (USA) |
| D4-A35T51DCBYNA | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| A3.5T51 | 3/9 Design control — primary reference Southco Inc |
| 50-007A51 | 5/2 Secondary reference U.S. Government activity |
NSN 5325-01-430-1820 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-430-1820 has 2 manufacturer part numbers on file: 2351-20-51D-C3Y (Southco Inc), D4-A35T51DCBYNA (Southco Inc).
Key specifications for 2351-20-51D-C3Y: Surface Treatment Document and Classification: QQ-P-416, TY 1 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Head Length: 0.875 INCHES NOMINAL IN; Turnlock Stud Shank Style: STUD SHANK; Stud Head Height: 0.880 INCHES NOMINAL IN. 10 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.