The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-105-1966, 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 11 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-105-1966 |
| Primary Part Number | AJ3-40ZBY |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Southco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 1 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Drive Type | SLOTTED |
| Turnlock Stud Shank Style | STUD SHANK |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.312 INCHES NOMINAL IN |
| Shank Neck Length | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OR ZINC OVERALL |
| Material | STEEL COMP 1118 OVERALL |
| Grip Length | 0.390 INCHES MINIMUM AND 0.410 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 |
|---|---|
| AJ3-40ZBY PRIMARY | Southco Inc (USA) |
| AJ3-40CBY PRIMARY | Southco Inc (USA) |
| Reference | Meaning |
|---|---|
| AJ3-40-I8 | 5/9 Secondary reference Southco Inc |
| K94T0012-1 | 5/9 Secondary reference Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co |
| K94T0012-1 | 5/9 Secondary reference Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Opns West |
| 012-1152-000 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 10119211 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AJ3-40 C-IY | 5/9 Secondary reference Southco Inc |
| AJ3-40-8P | 5/9 Secondary reference Southco Inc |
NSN 5325-01-105-1966 is a Stud,turnlock Fastener, manufactured by Southco Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-105-1966 has 2 manufacturer part numbers on file: AJ3-40ZBY (Southco Inc), AJ3-40CBY (Southco Inc).
Key specifications for AJ3-40ZBY: Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 1 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Drive Type: SLOTTED; Turnlock Stud Shank Style: STUD SHANK; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL. 11 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.