The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-213-8431, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Southco Inc. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 — Fastening Devices (FSG 53) |
| Manufacturers | Hamilton Sundstrand Corporation Dba Collins Aerospace (CAGE 73030); Southco Manufacturing Ltd (CAGE U1584); Southco Inc (CAGE 72794) |
| Parameter | Value |
|---|---|
| NSN | 5325-01-213-8431 |
| Primary Part Number | 121J-435-SS |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 541700S25 | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| D4-AJ4-35SS | Southco Manufacturing Ltd (GBR) |
| 121J-435-SS PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| H15-0018-114 | C/1 Advisory reference — outside the item-of-supply concept L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications |
| AJ4-35SS | 5/9 Secondary reference Southco Inc |
NSN 5325-01-213-8431 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-213-8431 has 3 manufacturer part numbers on file: 541700S25 (Hamilton Sundstrand Corporation Dba Collins Aerospace), D4-AJ4-35SS (Southco Manufacturing Ltd), 121J-435-SS (Southco Inc).
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.