The Nut Assembly,tube Coupling, cataloged under National Stock Number 4730-01-198-9673, 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 Hydraflow. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-198-9673 |
| Primary Part Number | 12N70-20A |
| Item Name | Nut Assembly,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydraflow |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 1.250 INCHES NOMINAL IN |
| Style Designator | NUT ASSEMBLY |
| Outside Diameter | 1.939 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1.812-16 |
| Screw Thread Series Designator | UN |
| Surface Treatment | ANODIZE |
| Thread Class | 2B |
| Material | ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| 12N70-20A PRIMARY | Hydraflow (USA) |
| W700-20D-03 PRIMARY | Transdigm Inc Div Adelwiggins Group (USA) |
| ST7M170-20D | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST7M170 | 7/1 Vendor item drawing reference The Boeing Company Div Defense |
| 10108955 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4730-01-198-9673 is a Nut Assembly,tube Coupling, manufactured by Hydraflow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-198-9673 has 3 manufacturer part numbers on file: 12N70-20A (Hydraflow), W700-20D-03 (Transdigm Inc Div Adelwiggins Group), ST7M170-20D (The Boeing Company Div Defense).
Key specifications for 12N70-20A: Tube Outside Diameter for Which Designed: 1.250 INCHES NOMINAL IN; Style Designator: NUT ASSEMBLY; Overall Length: 0.496 INCHES NOMINAL IN; Outside Diameter: 1.939 INCHES NOMINAL IN. 9 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.