The Nut,tube Coupling, cataloged under National Stock Number 4730-01-377-4265, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-377-4265 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Length to Shoulder | 0.681 INCHES NOMINAL IN |
| Width Across Flats | 1.625 INCHES NOMINAL IN |
| Largest Outside Diameter | 1.984 INCHES NOMINAL IN |
| Thread Series | UN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Seat Angle | 33.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.875 INCHES IN |
| Nut Height | 1.250 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 431 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 1.520 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 1.500 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 |
| Reference | Meaning |
|---|---|
| S4922481 | D/9 Drawing number reference only U.S. Government activity |
| S4922481-24 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-377-4265 is a Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-377-4265: Lubrication: DRY FILM LUBRICANT; Length to Shoulder: 0.681 INCHES NOMINAL IN; Width Across Flats: 1.625 INCHES NOMINAL IN; Largest Outside Diameter: 1.984 INCHES NOMINAL IN. 17 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.