The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-337-6636, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-00-337-6636 |
| Primary Part Number | 121J-W770-Z3C |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633,FE/ZN,25 SC4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Head Length | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Stud Head Height | 0.500 INCHES NOMINAL IN |
| Shank Neck Length | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Securing Device Type | WASHER |
| Turnlock Stud Head Style | FILLISTER WING |
| Stud Shank Major Diameter | 0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE AND ZINC OVERALL |
| Material | STEEL OVERALL |
| Grip Length | 0.690 INCHES MINIMUM AND 0.710 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 |
|---|---|
| 121J-W770-Z3C PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| 8485314 | 5/9 Secondary reference Us Army Aviation and Missile Command |
| AJW7-70 | 5/9 Secondary reference Southco Inc |
NSN 5325-00-337-6636 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-337-6636 has 1 manufacturer part number on file: 121J-W770-Z3C (Southco Inc).
Key specifications for 121J-W770-Z3C: Surface Treatment Document and Classification: ASTM B633,FE/ZN,25 SC4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Head Length: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN; Drive Type: SLOTTED; Material Accommodated Thickness: 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN. 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.