The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-589-2276, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-589-2276 |
| Primary Part Number | BACS21ED4AR |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Boeing Defence Australia Ltd |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD |
| Drive Type | CROSS RECESS |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Material Document and Classification | AMS5833 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5834 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE PIN |
| Diameter | 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN |
| Stud Head Height | 0.102 INCHES NOMINAL IN |
| Distance From Engaging Member to Largest Bearing Surface of Head | 0.750 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM STUD |
| Material | IRON ALLOY 660 STUD |
| Material | COBALT ALLOY OR IRON ALLOY 660 PIN |
| Stud Assembly Style | STUD ASSEMBLY |
| Eyelet Length | 0.257 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 |
|---|---|
| BACS21ED4AR | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACS21ED4AR | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-589-2276 is a Stud Assembly,turnlock Fastener, manufactured by Boeing Defence Australia Ltd, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-589-2276 has 1 manufacturer part number on file: BACS21ED4AR (Boeing Defence Australia Ltd).
Key specifications for BACS21ED4AR: Surface Treatment Document and Classification: QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE STUD; Drive Type: CROSS RECESS; Material Document and Classification: AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE STUD; Material Document and Classification: AMS5833 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5834 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE PIN. 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.