The Nut,tube Coupling, cataloged under National Stock Number 4730-01-012-1783, 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 Federal Industries, Inc. Dba United Valve Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-012-1783 |
| Primary Part Number | 2711403 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Federal Industries, Inc. Dba United Valve Company |
| Status | ACTIVE |
| Length to Shoulder | 0.582 INCHES NOMINAL IN |
| Width Across Flats | 2.375 INCHES MINIMUM AND 2.385 INCHES MAXIMUM IN |
| Thread Series | UN |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.125 INCHES IN |
| Nut Height | 0.875 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4130 OVERALL |
| Smallest Inside Diameter | 1.700 INCHES MINIMUM AND 1.730 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 2.375 INCHES 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 |
|---|---|
| 2711403 | Federal Industries, Inc. Dba United Valve Company (USA) |
| Reference | Meaning |
|---|---|
| 2711403 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-012-1783 is a Nut,tube Coupling, manufactured by Federal Industries, Inc. Dba United Valve Company, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-012-1783 has 1 manufacturer part number on file: 2711403 (Federal Industries, Inc. Dba United Valve Company).
Key specifications for 2711403: Length to Shoulder: 0.582 INCHES NOMINAL IN; Width Across Flats: 2.375 INCHES MINIMUM AND 2.385 INCHES MAXIMUM IN; Thread Series: UN; Material Document and Classification: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 14 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.