The Coupling,pipe, cataloged under National Stock Number 4730-01-646-6121, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Stainless Flow Technologies, Inc. Div Stainless Flow Technologies Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-646-6121 |
| Primary Part Number | 3504743 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Stainless Flow Technologies, Inc. Div Stainless Flow Technologies Inc |
| Status | ACTIVE |
| Connection Type | GROOVED COUPLING ALL ENDS |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.380 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 4.500 INCHES ALL ENDS IN |
| Nominal Width | 1.880 INCHES ALL ENDS IN |
| Nominal Coupling Size Accommodated | 3.000 INCHES ALL ENDS IN |
| Thread Quantity Per Inch | 16 ALL ENDS |
| Material | RUBBER SYNTHETIC GASKET |
| Material | STEEL STAINLESS - USE STB000 BODY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) ALL ENDS |
| 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 |
|---|---|
| 3504743 PRIMARY | Stainless Flow Technologies, Inc. Div Stainless Flow Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 3504743 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 4730-01-646-6121 is a Coupling,pipe, manufactured by Stainless Flow Technologies, Inc. Div Stainless Flow Technologies Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-646-6121 has 1 manufacturer part number on file: 3504743 (Stainless Flow Technologies, Inc. Div Stainless Flow Technologies Inc).
Key specifications for 3504743: Connection Type: GROOVED COUPLING ALL ENDS; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Nominal Thread Size: 0.380 INCHES ALL ENDS IN; Nominal Outside Diameter: 4.500 INCHES ALL ENDS IN. 10 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.