The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-054-4713, 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 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-054-4713 |
| Primary Part Number | 121J-450-SS |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-14072 FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE STUD |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.315 INCHES NOMINAL IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Material Document and Classification | ASTM A582 TYPE 303 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Diameter | 0.437 INCHES NOMINAL IN |
| Shank Neck Length | 0.250 INCHES NOMINAL IN |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE STUD |
| Material | STEEL COMP 303 STUD |
| Grip Length | 0.500 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 |
|---|---|
| AJ4-50SS | Southco Manufacturing Ltd (GBR) |
| 121J-450-SS PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| ES8202-06 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 396609-5 | 5/9 Secondary reference L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products |
| ES8202-06 | 7/9 Vendor item drawing reference Drs Sustainment Systems, Inc. |
| AJ4-50SS | 5/9 Secondary reference Southco Inc |
| 0019363-03 | 5/9 Secondary reference Peraton Inc |
NSN 5325-01-054-4713 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-054-4713 has 2 manufacturer part numbers on file: AJ4-50SS (Southco Manufacturing Ltd), 121J-450-SS (Southco Inc).
1 possible match (shared part number, not a government interchangeability claim): 3110-01-267-0051. Verify interchangeability with system specifications before substitution.
Key specifications for 121J-450-SS: Surface Treatment Document and Classification: MIL-P-14072 FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE STUD; Drive Type: SLOTTED; Material Accommodated Thickness: 0.315 INCHES NOMINAL IN; Turnlock Stud Shank Style: STUD SHANK. 12 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.