The Nut,tube Coupling, cataloged under National Stock Number 4730-01-375-6295, 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 Hughes Tool Co. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-375-6295 |
| Primary Part Number | DAA7257D170-001 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hughes Tool Co |
| Status | ACTIVE |
| Length to Shoulder | 0.250 INCHES NOMINAL IN |
| Width Across Flats | 0.620 INCHES NOMINAL IN |
| Thread Series | UNF |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nut Height | 0.540 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.362 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.500 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 |
| Part Number | Manufacturer |
|---|---|
| DAA7257D170-001 PRIMARY | Hughes Tool Co (USA) |
| Reference | Meaning |
|---|---|
| DAA7257D170-001 | 5/9 Secondary reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 4730-01-375-6295 is a Nut,tube Coupling, manufactured by Hughes Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-375-6295 has 1 manufacturer part number on file: DAA7257D170-001 (Hughes Tool Co).
Key specifications for DAA7257D170-001: Length to Shoulder: 0.250 INCHES NOMINAL IN; Width Across Flats: 0.620 INCHES NOMINAL IN; Thread Series: UNF; Seat Angle: 30.0 DEGREES NOMINAL. 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.