F socket female,screw frontside 1.we are the factory. 2.we do OEM 3.we have CE&ROSH F socket female,screw frontsideCB-CONN-31-1 11mm short type,1*twist stopCB-CONN-31-2 11mm short type,2*twist stopCB-CONN-31-3 15mm long type,2*twist stop F socket female