The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-641-2526, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-641-2526 |
| Primary Part Number | HS4431-12 |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Material Document and Classification | 81346-ASTM A228/A ASSN STD ALL MATERIAL RESPONSES LOCKSPRING |
| Material Document and Classification | 81346-ASTM A228/A ASSN STD ALL MATERIAL RESPONSES PIN |
| Material Document and Classification | 81346-ASTM A547 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A304 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A331 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A752 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS6300 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS 6322 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS-S-6049 ASSN STD ALL MATERIAL RESPONSES STUD |
| Material Document and Classification | 81348-AMS-QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OR 81346-ASTM A 109/A ASSN STD ALL MATERIAL RESPONSES RECEPTACLE |
| Material | STEEL STUD |
| Material | STEEL PIN |
| Material | STEEL LOCKSPRING |
| Material | STEEL RECEPTACLE |
| 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 |
|---|---|
| HS4431-12 PRIMARY | The Boeing Company (USA) |
NSN 5325-01-641-2526 is a Stud Assembly,turnlock Fastener, manufactured by The Boeing Company, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-641-2526 has 1 manufacturer part number on file: HS4431-12 (The Boeing Company).
Key specifications for HS4431-12: Material Document and Classification: 81346-ASTM A228/A ASSN STD ALL MATERIAL RESPONSES LOCKSPRING; Material Document and Classification: 81346-ASTM A228/A ASSN STD ALL MATERIAL RESPONSES PIN; Material Document and Classification: 81346-ASTM A547 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A304 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A322 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A331 ASSN STD ALL MATERIAL RESPONSES OR 81346-ASTM A752 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS6300 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS 6322 ASSN STD ALL MATERIAL RESPONSES OR 81348-AMS-S-6049 ASSN STD ALL MATERIAL RESPONSES STUD; Material Document and Classification: 81348-AMS-QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OR 81346-ASTM A 109/A ASSN STD ALL MATERIAL RESPONSES RECEPTACLE. 8 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.