The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-01-429-9636, 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 Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-429-9636 |
| Primary Part Number | Y3J70118 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc. |
| Status | ACTIVE |
| Width Across Flats | 1.125 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Thread Direction | LEFT-HAND |
| Thread Size | 1.000-20 |
| Screw Thread Series Designator | UNS |
| Thread Class | 2A A |
| Smallest Inside Diameter | 0.640 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 |
|---|---|
| Y3J70118 PRIMARY | Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| Y3J70118 | 5/9 Secondary reference Everllence Usa Inc. |
| 3Y3/016 ITEM 30 | 5/1 Secondary reference Man Diesel & Turbo Ltd |
NSN 4730-01-429-9636 is a Inverted Nut,tube Coupling, manufactured by Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-429-9636 has 1 manufacturer part number on file: Y3J70118 (Engine Systems, Inc. Dba Marine Systems Div Marine Systems, Inc.).
Key specifications for Y3J70118: Width Across Flats: 1.125 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Style Designator: INVERTED NUT, TUBE, FLARE; Overall Length: 0.812 INCHES NOMINAL IN. 8 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.