Male to Male Fitting (B Size threads on both ends for fuel connections). This part is great for connecting together 2 hoses with B size threaded connections or attaching a Y splitter to a B size thread at the end of a hose.

Y Connector For Fuel Gas, Standard "B" Size Fittings Part # E32 Price: $18.34 Y Connector For Oxygen With Closure Valves Part # E33 Price: $26.94 Y Connector For Fuel Gas With Closure Valves Part # E39 Price: $26.94