The Nut,tube Coupling, cataloged under National Stock Number 4730-01-231-8586, 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 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-231-8586 |
| Primary Part Number | SS-8-VCO-4 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Length to Shoulder | 0.500 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Hole Configuration Style | CONFIGURATION A |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.875 INCHES IN |
| Nut Height | 0.690 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 14 |
| Material | STEEL COMP 316 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.609 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 |
|---|---|
| CV0539-003 | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| SS-8-VCO-4 PRIMARY | Swagelok Co (USA) |
| SS-8-VCO-4 | Bss Group Plc (GBR) |
| Reference | Meaning |
|---|---|
| 6314573-2 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| SS-8-VCO-4 | 5/9 Secondary reference Cajon Co |
NSN 4730-01-231-8586 is a Nut,tube Coupling, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-231-8586 has 3 manufacturer part numbers on file: CV0539-003 (Northrop Grumman Corp Electronic Systems Defensive System Div), SS-8-VCO-4 (Swagelok Co), SS-8-VCO-4 (Bss Group Plc).
Key specifications for SS-8-VCO-4: Length to Shoulder: 0.500 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hole Configuration Style: CONFIGURATION A; Thread Direction: RIGHT-HAND. 13 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.