Amazon.com: mesome Aluminum Flare Metric M12 x 1.5 to -8 AN Male Check Valve with Spring Design Inside Parts, AN8 Non Return One Way Check Valve with M12 Washer, Designed for Bosch
M12x1.5MM 6AN One Way Check Valve +Inlet AN6 Fitting For Bosch 044 Fuel Pump US | eBay
Bosch 16149068988 Fuel Pump Check Valve for 044 / 61944 / 0580254044 Pump | High Efficiency | QFS