This special adapter lets you adapt the original one-way check valve on the Bosch 044 fuel pump outlet to your fuel hose.
Female 12x1.5mm threads at one end screw onto the male check valve supplied with the Bosch pump. The female -10 O-ring port (7/8-14 threads) at the other end makes it easy to adapt to your fuel system. Just add a -10 ORB adapter (sold separately) to match your hose.
Black anodized aluminum adapter includes a 12mm crush washer. Made in USA. Sold individually.
Matching O-ring boss adapter (as shown in lower cutaway photo) sold separately):
AN920-Style Black Aluminum AN Male to ORB Adpaters, Part No. 3604-xx-10