The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-589-2273, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc Div Camloc Products. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5325-01-589-2273 |
| Primary Part Number | BACS21ED8AR |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc Div Camloc Products |
| 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 | 0.870 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 | 0.382 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 |
|---|---|
| BACS21ED8AR | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| BACS21ED8AR | Boeing Defence Australia Ltd (AUS) |
| BACS21ED8AR | Monadnock Company, the Dba Lisi Aerospace (USA) |
| Reference | Meaning |
|---|---|
| BACS21ED8AR | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-589-2273 is a Stud Assembly,turnlock Fastener, manufactured by Howmet Global Fastening Systems Inc Div Camloc Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-589-2273 has 3 manufacturer part numbers on file: BACS21ED8AR (Howmet Global Fastening Systems Inc Div Camloc Products), BACS21ED8AR (Boeing Defence Australia Ltd), BACS21ED8AR (Monadnock Company, the Dba Lisi Aerospace).
Key specifications for BACS21ED8AR: 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.