The Nut,tube Coupling,reducing, cataloged under National Stock Number 4730-00-033-4856, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-033-4856 |
| Primary Part Number | 210422 |
| Item Name | Nut,tube Coupling,reducing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Length to Shoulder | 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Width Across Flats | 1.730 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN |
| Thread Series | UNS |
| Thread Pitch Diameters | +1.4594 TO 1.4634 INCHES IN |
| Seat Angle | 45.00 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.500 INCHES IN |
| Nut Height | 1.290 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN |
| Nut Style | TUBE COUPLING |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Smallest Inside Diameter | 1.150 INCHES MINIMUM AND 1.170 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 1.000 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 |
|---|---|
| 210422 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 210422 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 210422 | 5/9 Secondary reference Royal Oak Gage, Inc |
NSN 4730-00-033-4856 is a Nut,tube Coupling,reducing, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-033-4856 has 1 manufacturer part number on file: 210422 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
3 possible matches (shared part number, not a government interchangeability claim): 5930-00-501-0048, 5841-01-101-0996, 5920-01-222-4257. Verify interchangeability with system specifications before substitution.
Key specifications for 210422: Length to Shoulder: 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN; Width Across Flats: 1.730 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN; Thread Series: UNS; Thread Pitch Diameters: +1.4594 TO 1.4634 INCHES IN. 13 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.