The Nut,tube Coupling, cataloged under National Stock Number 4730-01-262-2522, 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 Bauer Equipment America, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-262-2522 |
| Primary Part Number | 90128 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bauer Equipment America, Inc. |
| Status | ACTIVE |
| Length to Shoulder | 11.5 MILLIMETERS NOMINAL MM |
| Width Across Flats | 19.0 MILLIMETERS NOMINAL MM |
| Thread Tolerance Class | 6H INTERNAL |
| Thread Series | ISO M |
| Thread Pitch in Millimeters | 1.50 |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 18.0 MILLIMETERS MM |
| Nut Height | 15.5 MILLIMETERS NOMINAL MM |
| Nut Style | TUBE COUPLING |
| Material | STEEL OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 18.8 MILLIMETERS NOMINAL MM |
| Nominal Tube Outside Diameter | 19.0 MILLIMETERS MM |
| 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 |
|---|---|
| 90128 PRIMARY | Bauer Equipment America, Inc. (USA) |
| Reference | Meaning |
|---|---|
| AS10 DIN 3870 | 5/9 Secondary reference Bauer Equipment America, Inc. |
NSN 4730-01-262-2522 is a Nut,tube Coupling, manufactured by Bauer Equipment America, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-262-2522 has 1 manufacturer part number on file: 90128 (Bauer Equipment America, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4920-01-300-2030, 5975-01-436-5815, 6550-01-547-4026. Verify interchangeability with system specifications before substitution.
Key specifications for 90128: Length to Shoulder: 11.5 MILLIMETERS NOMINAL MM; Width Across Flats: 19.0 MILLIMETERS NOMINAL MM; Thread Tolerance Class: 6H INTERNAL; Thread Series: ISO M. 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.