The type B Stainless Steel Camlock Coupler is a female coupler x 1/2″ male NPT, that fits into any male camlock fitting of the same size including Type F, A, E & DP (Dust Plug). Cam and groove fittings provide easy connecting/disconnecting of hoses to pumps, kettles, mash tuns, plate chillers and more, in a faster and more convenient way than with conventional threaded fittings. A must have for all grain brewers. All of our camlock couplers are 1/2″ threading and made of 304 grade stainless steel.
New 10 Lb Aluminum CO2 Tank 
Darrell Clarke (verified owner) –
These connect well, but the connections are much larger then other 1/2” camlock couplers. May not be compatible with your existing setup