The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-121-2829, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-121-2829 |
| Primary Part Number | 3M302A5-3 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Drive Type | SOCKET |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.361 INCHES NOMINAL IN |
| Diameter | 0.399 INCHES NOMINAL IN |
| Stud Head Height | 0.040 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FLAT FILLISTER |
| Stud Shank Major Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Stud Thread Size and Series/type Designator | 0.190-32 UNF |
| Grip Length | 0.182 INCHES MINIMUM AND 0.192 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 |
|---|---|
| M1916-5-3 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 3M302A5-3 | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| 3M302A5-3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 01916-5-3 | 5/2 Secondary reference U.S. Government activity |
| 01916-5-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5325-01-121-2829 is a Stud,turnlock Fastener, manufactured by The Boeing Company Div Defense, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-121-2829 has 3 manufacturer part numbers on file: M1916-5-3 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), 3M302A5-3 (Howmet Global Fastening Systems Inc. Div Voi-Shan Products), 3M302A5-3 (The Boeing Company Div Defense).
Key specifications for 3M302A5-3: Drive Type: SOCKET; Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.361 INCHES NOMINAL IN; Diameter: 0.399 INCHES NOMINAL 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.