The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-312-7679, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Voi-Shan Products. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-312-7679 |
| Primary Part Number | 3223S6-8 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Voi-Shan Products |
| Status | ACTIVE |
| Drive Type | SOCKET |
| Material Accommodated Thickness | 0.376 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.078 INCHES MAXIMUM IN |
| Diameter | 0.480 INCHES NOMINAL IN |
| Securing Device Type | SPRING |
| Turnlock Stud Head Style | FLAT COUNTERSUNK |
| Stud Shank Major Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | IRON ALLOY 660 OVERALL |
| Stud Thread Size and Series/type Designator | 0.250-28 UNIFIED NATIONAL JOINT FINE (UNJF) |
| Grip Length | 0.952 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 |
|---|---|
| 3223S6-8 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3223S6-8 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| 3M1055C6A8 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 3223S6-8 | 5/9 Secondary reference U.S. Government activity |
| 3223S6-8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-312-7679 is a Stud,turnlock Fastener, manufactured by Howmet Global Fastening Systems Inc. Div Voi-Shan Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-312-7679 has 3 manufacturer part numbers on file: 3223S6-8 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), 3223S6-8 (Howmet Global Fastening Systems Inc. Div Tridair Products), 3M1055C6A8 (The Boeing Company Div Defense).
Key specifications for 3223S6-8: Drive Type: SOCKET; Material Accommodated Thickness: 0.376 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.078 INCHES MAXIMUM IN. 12 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.