The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-516-3256, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Southco Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-516-3256 |
| Primary Part Number | 3506-SC39A-EEB |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD |
| Eyelet Outside Diameter | 0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN |
| Material Accommodated Thickness | 0.070 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6300 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Diameter | 0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN |
| Stud Head Height | 0.285 INCHES NOMINAL IN |
| Distance From Engaging Member to Largest Bearing Surface of Head | 0.540 INCHES NOMINAL IN |
| Turnlock Stud Head Style | FLAT FILLISTER |
| Surface Treatment | CADMIUM AND CHROMATE STUD |
| Material | STEEL COMP 4037 STUD |
| Stud Assembly Style | STUD ASSEMBLY |
| Stud Diameter | 0.212 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Eyelet Length | 0.080 INCHES MINIMUM AND 0.100 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 |
|---|---|
| 3506-SC39A-EEB PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| PFSC35-39A-SEB | 5/9 Secondary reference Southco Inc |
| GS520U5 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5325-01-516-3256 is a Stud Assembly,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-516-3256 has 1 manufacturer part number on file: 3506-SC39A-EEB (Southco Inc).
Key specifications for 3506-SC39A-EEB: Surface Treatment Document and Classification: QQ-P-416, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD; Eyelet Outside Diameter: 0.373 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN; Material Accommodated Thickness: 0.070 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN; Material Document and Classification: AMS 6300 ASSN STD SINGLE MATERIAL RESPONSE STUD. 13 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.