The Nut,tube Coupling, cataloged under National Stock Number 4730-01-030-2761, 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 Hydro-Fitting Manufacturing Corporation. Government technical data includes 16 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-030-2761 |
| Primary Part Number | BACN10DTG32D |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydro-Fitting Manufacturing Corporation |
| Status | ACTIVE |
| Length to Shoulder | 1.462 INCHES NOMINAL IN |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Largest Outside Diameter | 2.750 INCHES NOMINAL IN |
| Thread Series | UN |
| Material Document and Classification | QQ-A-200/3,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Seat Angle | 0.33 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.500 INCHES IN |
| Nut Height | 2.050 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Smallest Inside Diameter | 2.167 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 2.414 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 |
|---|---|
| BACN10DTG32D PRIMARY | Hydro-Fitting Manufacturing Corporation (USA) |
| Reference | Meaning |
|---|---|
| BACN10DT | D/9 Drawing number reference only U.S. Government activity |
| BACN10DTG32D | 5/2 Secondary reference U.S. Government activity |
| 1909G32D | 3/2 Design control — primary reference U.S. Government activity |
| 1909-32 | D/9 Drawing number reference only U.S. Government activity |
| 1909G32D | 5/9 Secondary reference Hydro-Fitting Manufacturing Corporation |
NSN 4730-01-030-2761 is a Nut,tube Coupling, manufactured by Hydro-Fitting Manufacturing Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-030-2761 has 1 manufacturer part number on file: BACN10DTG32D (Hydro-Fitting Manufacturing Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5895-01-278-8891. Verify interchangeability with system specifications before substitution.
Key specifications for BACN10DTG32D: Length to Shoulder: 1.462 INCHES NOMINAL IN; Width Across Flats: 0.750 INCHES NOMINAL IN; Largest Outside Diameter: 2.750 INCHES NOMINAL IN; Thread Series: UN. 16 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.