The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-350-4644, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-350-4644 |
| Primary Part Number | D6-UH4T20Y218DFLNA |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Width Across Flats | 0.438 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.384 INCHES NOMINAL IN |
| Drive Type | SLOTTED |
| Turnlock Stud Shank Style | STUD SHANK |
| Stud Head Height | 0.204 INCHES NOMINAL IN |
| Turnlock Stud Head Style | STUD HEAD |
| Stud Shank Major Diameter | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1117 OVERALL |
| Grip Length | 0.665 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 |
|---|---|
| D6-UH4T20Y218DFLNA PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| 5784-20-20-25218 | 5/9 Secondary reference Southco Inc |
| UH4T20I8Y218 | 5/9 Secondary reference Southco Inc |
| UH4T20Y218 | 5/9 Secondary reference Southco Inc |
NSN 5325-01-350-4644 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-350-4644 has 1 manufacturer part number on file: D6-UH4T20Y218DFLNA (Southco Inc).
Key specifications for D6-UH4T20Y218DFLNA: Width Across Flats: 0.438 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Extended Washer Diameter: 0.384 INCHES NOMINAL IN; Drive Type: SLOTTED. 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.