The Coupling,two-Piece, cataloged under National Stock Number 5342-01-645-3138, is classified within Federal Supply Class 5342 (Hardware, Weapon System) of the Hardware and Abrasives group. The manufacturer of record is Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5342-01-645-3138 |
| Primary Part Number | 20358 |
| Item Name | Coupling,two-Piece |
| FSC / FSG | 5342 / 53 — Hardware, Weapon System |
| Manufacturer | Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company |
| Status | ACTIVE |
| Overall Diameter | 4.250 INCHES NOMINAL IN |
| Color | BLACK |
| Material | ALUMINUM |
| 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 |
|---|---|
| 20358 PRIMARY | Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company (USA) |
| Reference | Meaning |
|---|---|
| 6604272 | 7/9 Vendor item drawing reference Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company |
NSN 5342-01-645-3138 is a Coupling,two-Piece, manufactured by Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company, classified under FSC 5342, Hardware, Weapon System. Status: active.
NSN 5342-01-645-3138 has 1 manufacturer part number on file: 20358 (Allegheny Valve & Coupling, Inc. Dba Allegheny Coupling Company).
Key specifications for 20358: Overall Height: 1.594 INCHES NOMINAL IN; Overall Diameter: 4.250 INCHES NOMINAL IN; Color: BLACK; Special Features: CAGE LISTED IS OEM. 3 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.