Swagelok SS-1VS8 316 stainless steel integral bonnet needle valve with black phenolic knob, 1/2 inch Swagelok tube fitting

DK-LOK DUB Bulkhead Union

The DK-LOK DUB is a bulkhead union that carries a tube line through a panel or enclosure wall and joins two tube lines of the same outside diameter. The body passes through the panel and is secured with a bulkhead locknut. Both tube ends use DK-LOK’s twin (double) ferrule gaugeable design for a leak-free seal under vibration, vacuum, and impulse service. The base ‘DUB’ code carries no material suffix (-S/-B), so the alloy must be verified by the full part number.

Key Features

Bulkhead-mount union for passing tube through a panel or wall
Twin (double) ferrule compression seal on both tube ends
Bulkhead locknut secures the fitting to the panel
Connects two tube lines of the same outside diameter
Available in fractional and metric tube OD sizes
Leak-tight under vibration, vacuum, and impulse conditions

Technical Specifications

Brand: DK-LOK
Part Code: DUB
Type: Bulkhead Union (Tube-to-Tube)
Fitting Type: Bulkhead Union
Ferrule Design: Twin / double ferrule
Body Material: COMING SOON
Mounting: Bulkhead / panel mount with locknut
Temperature Rating: 316 SS material rated -425°F to 1200°F (-253°C to 649°C) per DK-LOK; final rating governed by the tubing and service – call for your application
Tube OD Range: 1/16 in. to 2 in. (fractional); 2 mm to 38 mm (metric)
Design Standard: Twin-ferrule fitting, tested to ASTM F1387
Working Pressure: Rated by tube size and wall thickness per the DK-LOK catalog. Call for quote.