This special adapter lets you adapt the original one-way check valve on the Bosch "044" (FP200) or the newer FP200-7 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