We can provide two choices: the typical is a ACME type I connector 
. Appliance side swivel nut fitting is female 1-5/16” ACME x 1/4” M.P.T.. As the appliance side of theType I connection, it makes a positive connection by threading on to the ACME threads of the valve with a user-friendly right hand turn motion. Simple to use with its wrenchless, familiar right hand thread. Another choice would be a soft nose connector 
. 1/4” M.P.T. x Excess Flow Soft Nose P.O.L. with Plastic Handwheel. Some of our European customers go to their local propane store to to change to their local connector type.