The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-925-0639, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-925-0639 |
| Primary Part Number | GS522H11 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.188 INCHES NOMINAL IN |
| Diameter | 0.312 INCHES NOMINAL IN |
| Stud Head Height | 0.438 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | KNURLED |
| Stud Shank Major Diameter | 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL OVERALL |
| Stud Thread Size and Series/type Designator | 0.164-32 UNIFIED NATIONAL COARSE (UNC) |
| Grip Length | 0.247 INCHES MINIMUM AND 0.249 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 |
|---|---|
| GS522H11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 2887878-2 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| CA1828-1 | Fairchild Fasteners Europe - Camloc Gmbh (DEU) |
| GS522H1 | Northrop Grumman Systems Corporation (USA) |
| CA1828-1 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| FT5029-1 | Fastener Technology Corp (USA) |
| 11437568-2 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 128-0120-001 | 5/9 Secondary reference U.S. Government activity |
| 10071868-101 | 5/9 Secondary reference U.S. Government activity |
| 11437568-2 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 5325-00-925-0639 is a Stud,turnlock Fastener, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-925-0639 has 7 manufacturer part numbers on file: GS522H11 (Northrop Grumman Systems Corporation), 2887878-2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), CA1828-1 (Fairchild Fasteners Europe - Camloc Gmbh), GS522H1 (Northrop Grumman Systems Corporation), CA1828-1 (Howmet Global Fastening Systems Inc. Div Tridair Products) and 2 more.
Key specifications for GS522H11: Drive Type: SLOTTED; Material Accommodated Thickness: 0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.188 INCHES NOMINAL 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.