The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-446-3531, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-446-3531 |
| Primary Part Number | 3M302C5-4 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | Q-P-35 FED SPEC 1ST TREATMENT RESPONSE BARREL |
| Drive Type | SOCKET |
| Material Accommodated Thickness | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.361 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.399 INCHES NOMINAL IN |
| Stud Head Height | 0.045 INCHES NOMINAL IN |
| Turnlock Stud Head Style | FLAT FILLISTER |
| Stud Shank Major Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | IRON ALLOY 660 OVERALL |
| Stud Thread Size and Series/type Designator | 0.190-32 UNIFIED NATIONAL JOINT FINE (UNJF) |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 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 |
|---|---|
| 3M302C5-4 | Howmet Global Fastening Systems Inc (USA) |
| 3M302C5-4 PRIMARY | The Boeing Company Div Defense (USA) |
| M191012-5-4 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| 191012-5-4 | 5/2 Secondary reference U.S. Government activity |
| 191012-5-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5325-01-446-3531 is a Stud,turnlock Fastener, manufactured by The Boeing Company Div Defense, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-446-3531 has 3 manufacturer part numbers on file: 3M302C5-4 (Howmet Global Fastening Systems Inc), 3M302C5-4 (The Boeing Company Div Defense), M191012-5-4 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok).
Key specifications for 3M302C5-4: Surface Treatment Document and Classification: Q-P-35 FED SPEC 1ST TREATMENT RESPONSE BARREL; Drive Type: SOCKET; Material Accommodated Thickness: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 14 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.