Garden Hose Camlock Part QB - A quick way to change between garden hoses and accessories like your sprinkler, watering wands, spray guns etc. The part QB camlock shown here has a 3/4" MGHT (male garden hose thread) on one end and a 3/4" female coupler on the other end. This camlock part QB is usually attached to the end of your hose (nearest the faucet) then to faucet connector (QA). You will need to purchase the Adapter portion QA to make this work.