This 3/16" swlvel elbow fits all threaded ball and pin lock disconnects. This is the only way to make a ball or pin lock threaded disconnect accept 3/16" tubing.
If using this 3/16" fitting to attach semi-rigid 3/16" Bev-Seal tubing, you will need to soak the Bev-Seal tubing in boiling water for 30 seconds to soften it so it will fit this nipple. Once you slip the softened tubing over the nipple, a hose clamp is not needed. (this step is not needed with softer vinyl 3/16" beer tubing).
This shows the swlvel elbow attached to a ball lock fitting.