The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-166-3691, 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 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-166-3691 |
| Primary Part Number | PL501-1-1 |
| Item Name | Stud Assembly,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 2 FED SPEC SINGLE TREATMENT RESPONSE RETAINER |
| Extended Washer Diameter | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Eyelet Outside Diameter | 0.437 INCHES NOMINAL IN |
| Material Accommodated Thickness | 0.050 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Diameter | 0.375 INCHES MAXIMUM IN |
| Stud Head Height | 0.380 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FLAT FILLISTER W/EXTENDED WASHER |
| Surface Treatment | CADMIUM AND CHROMATE RETAINER |
| Material | STEEL COMP 1010 RETAINER |
| Stud Assembly Style | STUD ASSEMBLY |
| 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 |
|---|---|
| PL501-1-1 PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| PL-501-1-1 PRIMARY | Deutsch Co the (USA) |
NSN 5325-01-166-3691 is a Stud Assembly,turnlock Fastener, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-166-3691 has 2 manufacturer part numbers on file: PL501-1-1 (Huck International, Inc. Div Huck Products Division), PL-501-1-1 (Deutsch Co the).
Key specifications for PL501-1-1: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE RETAINER; Extended Washer Diameter: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN; Eyelet Outside Diameter: 0.437 INCHES NOMINAL IN; Material Accommodated Thickness: 0.050 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN. 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.