The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-557-9640, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Huck Products Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-557-9640 |
| Primary Part Number | D3012-0-1 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Huck International, Inc. Div Huck Products Division |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SOCKET |
| Material Accommodated Thickness | 0.062 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.312 INCHES NOMINAL IN |
| Stud Head Height | 0.062 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FLAT FILLISTER |
| Stud Shank Major Diameter | 0.216 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 8740 OVERALL |
| Grip Length | 0.280 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 |
|---|---|
| D3012-0-1 PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| D3012-0-1 | Howmet Fixations Simmonds SAS (FRA) |
| 721615-15 | Raytheon Company Div Rmd Strategic (USA) |
| Reference | Meaning |
|---|---|
| D3012-0-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-00-557-9640 is a Stud,turnlock Fastener, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-557-9640 has 3 manufacturer part numbers on file: D3012-0-1 (Huck International, Inc. Div Huck Products Division), D3012-0-1 (Howmet Fixations Simmonds SAS), 721615-15 (Raytheon Company Div Rmd Strategic).
Key specifications for D3012-0-1: Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SOCKET; Material Accommodated Thickness: 0.062 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN; Material Document and Classification: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.