The Stud,turnlock Fastener, cataloged under National Stock Number 5325-00-451-9191, 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 Tridair Products. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-451-9191 |
| Primary Part Number | CA1824-4B |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Drive Type | SOCKET |
| Turnlock Stud Shank Style | STUD SHANK |
| Extension Length | 0.234 INCHES NOMINAL IN |
| Diameter | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | FILLISTER |
| Stud Shank Major Diameter | 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 316 OVERALL |
| Stud Thread Size and Series/type Designator | 0.164-32 UNIFIED NATIONAL COARSE (UNC) |
| Grip Length | 0.438 INCHES MINIMUM AND 0.531 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 |
|---|---|
| CA1824-4B PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 860140-84 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| 860140-84 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5325-00-451-9191 is a Stud,turnlock Fastener, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-451-9191 has 1 manufacturer part number on file: CA1824-4B (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA1824-4B: Surface Treatment Document and Classification: MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Drive Type: SOCKET; Turnlock Stud Shank Style: STUD SHANK; Extension Length: 0.234 INCHES NOMINAL IN. 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.