The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-412-6401, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-412-6401 |
| Primary Part Number | 3C4066P03 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.320 INCHES NOMINAL IN |
| Diameter | 0.750 INCHES NOMINAL IN |
| Stud Head Height | 0.250 INCHES NOMINAL IN |
| Turnlock Stud Head Style | KNURLED |
| Stud Shank Major Diameter | 0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN |
| Material | STEEL COMP 4130 OR STEEL COMP 4142 OVERALL |
| Stud Thread Size and Series/type Designator | 0.250-20 UNIFIED NATIONAL COARSE (UNC) |
| Grip Length | 3.360 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 |
|---|---|
| 3C4066P03 PRIMARY | General Electric Company (USA) |
NSN 5325-01-412-6401 is a Stud,turnlock Fastener, manufactured by General Electric Company, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-412-6401 has 1 manufacturer part number on file: 3C4066P03 (General Electric Company).
Key specifications for 3C4066P03: Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.320 INCHES NOMINAL IN; Diameter: 0.750 INCHES NOMINAL IN; Stud Head Height: 0.250 INCHES NOMINAL IN. 9 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.