The Nut Assembly,tube Coupling, cataloged under National Stock Number 4730-00-277-1383, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-277-1383 |
| Primary Part Number | 12H72-8A |
| 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 | 0.500 INCHES NOMINAL IN |
| Style Designator | NUT ASSEMBLY |
| Outside Diameter | 1.126 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1.000-16 |
| Screw Thread Series Designator | UN |
| Surface Treatment | ANODIZE |
| Thread Class | 2B |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| W702-8D | Transdigm Inc Div Adelwiggins Group (USA) |
| 12H72-8A PRIMARY | Hydraflow (USA) |
| ST7M191-8D PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST7M191 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4730-00-277-1383 is a Nut Assembly,tube Coupling, manufactured by Hydraflow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-277-1383 has 3 manufacturer part numbers on file: W702-8D (Transdigm Inc Div Adelwiggins Group), 12H72-8A (Hydraflow), ST7M191-8D (The Boeing Company Div Defense).
3 possible matches (shared part number, not a government interchangeability claim): 4730-00-294-1516, 4730-01-083-2889, 4730-01-083-2890. Verify interchangeability with system specifications before substitution.
Key specifications for 12H72-8A: Tube Outside Diameter for Which Designed: 0.500 INCHES NOMINAL IN; Style Designator: NUT ASSEMBLY; Overall Length: 0.523 INCHES MAXIMUM IN; Outside Diameter: 1.126 INCHES MAXIMUM 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.
NSN 4730-00-277-1383 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.