The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-357-8121, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-357-8121 |
| Primary Part Number | 2506-20-50-24-C3Y |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.471 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.562 INCHES NOMINAL IN |
| Shank Neck Length | 0.610 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FLAT COUNTERSUNK |
| Stud Shank Major Diameter | 0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 8620 OVERALL |
| Grip Length | 0.800 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 |
|---|---|
| 2506-20-50-24-C3Y PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| FST50X | C/1 Advisory reference — outside the item-of-supply concept Southco Inc |
| GS520D10-50 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| F5T50X | 3/9 Design control — primary reference Southco Inc |
NSN 5325-01-357-8121 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-357-8121 has 1 manufacturer part number on file: 2506-20-50-24-C3Y (Southco Inc).
Key specifications for 2506-20-50-24-C3Y: Surface Treatment Document and Classification: QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Material Accommodated Thickness: 0.471 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK. 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.