https://brennaninc.com/product-category/double-ferrule-tube-fittings/
Double ferrule tube fittings are a common style of instrumentation fittings. They can withstand high pressures in a variety of different applications.
doubleferruletubefittingsbrennan
https://brennaninc.com/product-category/double-ferrule-tube-fittings-brass/
Double ferrule tube fittings are the most common style of instrumentation fittings, and they can also be purchased in brass materials.
brassdoubleferruletubefittings
https://brennaninc.com/product-category/single-ferrule-tube-fittings-brass/
Brass single ferrule tube fittings provide better resistance to high vibrations, fluctuations in temperature or pulsation than double ferrule tube fittings.
brasssingleferruletubefittings
https://brennaninc.com/product-category/single-ferrule-tube-fittings/
Single ferrule tube fittings are easier to assemble than the double ferrule tube fittings because there is one less component in the application process.
singleferruletubefittingsbrennan