This special aluminum cap is designed specifically to let you use a banjo fitting (sold separately) on the male-threaded outlet fitting of the Bosch 044 Fuel Pump (Part No. FS FP044, sold separately). Simply add your 12mm banjo fitting with a crush washer above and below, and install this cap. The cap can seal with a banjo fitting as thin as 1/2" (12mm).
Suggested fittings available separately:
6AN to 12mm Banjo Adapter, Part No. 3265-61
12mm Aluminum Crush Washers, Part No. 3278-M12
Now available as part of a complete kit! Out Bosch 044 Pump Outlet to 6AN Banjo Adapter Kit (Part No. 3275-059) includes this cap, the 6AN banjo adapter, and two crush washers.