The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-290-2724, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-290-2724 |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TY2 CL2 FED SPEC 1ST TREATMENT RESPONSE CAP |
| Surface Treatment Document and Classification | QQ-P-416 TY2 CL2 FED SPEC 1ST TREATMENT RESPONSE STUD |
| Eyelet Outside Diameter | 0.412 INCHES MINIMUM AND 0.427 INCHES MAXIMUM IN |
| Drive Type | CROSS RECESS |
| Material Accommodated Thickness | 0.188 INCHES NOMINAL IN |
| Material Document and Classification | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE AND AMS5731 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Material Document and Classification | QQ-C-530 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE CAP |
| Diameter | 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN |
| Distance From Engaging Member to Largest Bearing Surface of Head | 0.693 INCHES MINIMUM AND 0.723 INCHES MAXIMUM IN |
| Turnlock Stud Head Style | FLAT COUNTERSUNK |
| Surface Treatment | CADMIUM AND CHROMATE STUD |
| Surface Treatment | CADMIUM AND CHROMATE CAP |
| Material | COBALT ALLOY PIN |
| Material | COPPER ALLOY CAP |
| Material | COBALT ALLOY EJECTOR SPRING |
| Material | IRON ALLOY 660 STUD |
| Stud Assembly Style | STUD ASSEMBLY |
| Eyelet Length | 0.402 INCHES MINIMUM AND 0.422 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 |
| Reference | Meaning |
|---|---|
| BACS21X9AR | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-290-2724 is a Stud Assembly,turnlock Fastener, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-290-2724: Surface Treatment Document and Classification: QQ-P-416 TY2 CL2 FED SPEC 1ST TREATMENT RESPONSE CAP; Surface Treatment Document and Classification: QQ-P-416 TY2 CL2 FED SPEC 1ST TREATMENT RESPONSE STUD; Eyelet Outside Diameter: 0.412 INCHES MINIMUM AND 0.427 INCHES MAXIMUM IN; Drive Type: CROSS RECESS. 18 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.