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

DK-LOK DUA-S AN Union

The DK-LOK DUA is an AN union tube fitting that joins a DK-LOK twin-ferrule tube end to a 37-degree AN (SAE J514) flare connection. The ‘-S’ designation indicates 316 stainless steel construction. AN-style fittings are commonly used in military, aerospace, and instrumentation applications.

Key Features

Twin-ferrule tube end mated to a 37-degree AN (SAE J514) flare port
316 stainless steel body for corrosion resistance
Designed to SAE J514 AN flare standard
Reusable double-ferrule grip with predictable make-up
Available in matched tube OD and AN flare sizes
Suited to high-vibration and high-pressure service

Technical Specifications

Brand: DK-LOK
Part Code: DUA-S
Type: AN Union (Tube OD to 37-degree AN flare)
Fitting Type: AN Union
Ferrule Design: Twin / double ferrule
Body Material: 316 Stainless Steel
Flare Standard: SAE J514, 37-degree AN flare
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.