Did you lose or damage your collar nut? Buy a second-hand kit missing pieces? No problem, we’ve got you covered! These proprietary billet collar nuts are what we machine for all of our 5/16″ and 3/8″ QD hose fittings. These are ONLY intended for use as a replacement part for your Dorch hose assembly. These are always in stock ready to ship for quick replacements!

For the smaller 5/16″ QD fittings, it’s the blue nut. This would be for most OEM hardline connections. For the larger 3/8″ fittings, it’s the black nut. This would be for all DS1 and DS2 inlet connections or for ethanol sensor connections.