The Nut,tube Coupling, cataloged under National Stock Number 4730-01-019-4899, 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 Swagelok Co. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-019-4899 |
| Primary Part Number | SS4VCO-4 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| Thread Series | UNF |
| Seat Angle | 0.45 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Nut Height | 0.656 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Smallest Inside Diameter | 0.391 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.375 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 |
|---|---|
| CV0544-009 | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| SS4VCO-4 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| SS-4-VCO-4 | 5/9 Secondary reference Swagelok Quick-Connect Co |
| 7055894 FIND 20 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| SA-92-054-1 ITEM 10B | 5/9 Secondary reference Stephens Analytical Inc |
| 6314573-1 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| SS4VCO-4 | 5/9 Secondary reference Cajon Co |
| SS-4-VCO-4 | C/1 Advisory reference — outside the item-of-supply concept Stephens Analytical Inc |
| 6314783 FIND NO 11 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4730-01-019-4899 is a Nut,tube Coupling, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-019-4899 has 2 manufacturer part numbers on file: CV0544-009 (Northrop Grumman Corp Electronic Systems Defensive System Div), SS4VCO-4 (Swagelok Co).
Key specifications for SS4VCO-4: Width Across Flats: 0.688 INCHES NOMINAL IN; Thread Series: UNF; Seat Angle: 0.45 DEGREES NOMINAL; Thread Direction: RIGHT-HAND. 12 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.