The shank of this bolt measures 31mm (1.22") long. The 12x1.50mm coarse thread fits the outlet side of the Bosch "044" fuel pump as well as some Weber carburetors.
The shank is designed to fit 12mm ID banjo adapters such as our 6AN to 12mm Banjo Adapter (Part No. 3265-61).
Sold individually. Banjo adapter and 12mm Aluminum Crush Washers (Part No. 3278-M12) are sold separately.