The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-303-8180, 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 11 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-303-8180 |
| Primary Part Number | ST3M472R5A340E |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.321 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Diameter | 0.560 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.262 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.517 INCHES MINIMUM AND 0.537 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 |
|---|---|
| 112031-340 | Monadnock Company, the Dba Lisi Aerospace (USA) |
| FIT7078R5A340E | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M472R5A340E PRIMARY | The Boeing Company Div Defense (USA) |
| TST3M472R5A340E | Trico Manufacturing Inc. (USA) |
| Reference | Meaning |
|---|---|
| TST3M472R5C340E | C/1 Advisory reference — outside the item-of-supply concept Trico Manufacturing Inc. |
| ST3M47WR5A340E | 5/9 Secondary reference The Boeing Company Div Defense |
| FIT7078R5C340E | C/1 Advisory reference — outside the item-of-supply concept Fastener Innovation Technology, Inc. Dba F I T |
NSN 5325-01-303-8180 is a Stud,turnlock Fastener, manufactured by The Boeing Company Div Defense, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-303-8180 has 4 manufacturer part numbers on file: 112031-340 (Monadnock Company, the Dba Lisi Aerospace), FIT7078R5A340E (Fastener Innovation Technology, Inc. Dba F I T), ST3M472R5A340E (The Boeing Company Div Defense), TST3M472R5A340E (Trico Manufacturing Inc.).
Key specifications for ST3M472R5A340E: Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Material Accommodated Thickness: 0.321 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 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.