The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-337-6751, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. Government technical data includes 13 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-337-6751 |
| Primary Part Number | 3M303C6W7 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Drive Type | SOCKET |
| Material Accommodated Thickness | 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.460 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A286 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.490 INCHES NOMINAL IN |
| Securing Device Type | RING |
| 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 | STEEL CORROSION RESISTING OVERALL |
| Stud Thread Size and Series/type Designator | 0.250-2B UNIFIED NATIONAL JOINT FINE (UNJF) |
| Grip Length | 0.432 INCHES MINIMUM AND 0.442 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 |
|---|---|
| 192015-6-7 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| 192015-6-7 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M303C6W7 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| 3M303C6W7 | 5/2 Secondary reference U.S. Government activity |
| 3M303C6W7 | 3/2 Design control — primary reference U.S. Government activity |
| 192015-6-7 | 5/9 Secondary reference U.S. Government activity |
| 192015-6-7 | 5/9 Secondary reference U.S. Government activity |
| 3M303C6W7 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| M192015-6-7 | 5/1 Secondary reference Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
NSN 5325-01-337-6751 is a Stud,turnlock Fastener, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-337-6751 has 3 manufacturer part numbers on file: 192015-6-7 (Howmet Global Fastening Systems Inc. Div Tridair Products), 192015-6-7 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), 3M303C6W7 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok).
Key specifications for 3M303C6W7: Drive Type: SOCKET; Material Accommodated Thickness: 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.460 INCHES NOMINAL IN. 13 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.