The Nut,tube Coupling, cataloged under National Stock Number 4730-01-351-9195, 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 Environmental Tectonics Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-351-9195 |
| Primary Part Number | A300-250-52/109 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Environmental Tectonics Corp |
| Status | ACTIVE |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Thread Direction | RIGHT-HAND |
| Purchase Description Identification | 33714-A300-250-52/109 |
| Nominal Thread Size | 0.625 INCHES IN |
| Nut Height | 0.500 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 316 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.444 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.442 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 |
|---|---|
| A300-250-52/109 PRIMARY | Environmental Tectonics Corp (USA) |
NSN 4730-01-351-9195 is a Nut,tube Coupling, manufactured by Environmental Tectonics Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-351-9195 has 1 manufacturer part number on file: A300-250-52/109 (Environmental Tectonics Corp).
Key specifications for A300-250-52/109: Width Across Flats: 0.688 INCHES NOMINAL IN; Thread Series: UNEF; Thread Direction: RIGHT-HAND; Purchase Description Identification: 33714-A300-250-52/109. 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.