The Ferrule,brazing,tube Fitting, cataloged under National Stock Number 4730-01-134-8937, 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 Transdigm Inc Div Adelwiggins Group. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-134-8937 |
| Primary Part Number | W903B12D |
| Item Name | Ferrule,brazing,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Transdigm Inc Div Adelwiggins Group |
| Status | ACTIVE |
| Style Designator | GASKET SEAL |
| Sleeve Outside Diameter | 0.890 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Flange Width | 0.230 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 |
| Flange Outside Diameter | 0.994 INCHES MAXIMUM IN |
| Hose/tube Outside Diameter for Which Designed | 0.750 INCHES NOMINAL 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 |
|---|---|
| W903B12D PRIMARY | Transdigm Inc Div Adelwiggins Group (USA) |
| 14F13-12D | Hydraflow (USA) |
| ST7M406-12D | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST7M406 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 4730PL0735819 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4730-01-134-8937 is a Ferrule,brazing,tube Fitting, manufactured by Transdigm Inc Div Adelwiggins Group, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-134-8937 has 3 manufacturer part numbers on file: W903B12D (Transdigm Inc Div Adelwiggins Group), 14F13-12D (Hydraflow), ST7M406-12D (The Boeing Company Div Defense).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-307-3901, 4730-01-527-9345. Verify interchangeability with system specifications before substitution.
Key specifications for W903B12D: Style Designator: GASKET SEAL; Overall Length: 0.783 INCHES MAXIMUM IN; Sleeve Outside Diameter: 0.890 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED. 7 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.