I have a Shure SM-58, and when I plug it into an XLR cable the connection isn't very tight and the cord seems to wiggle a lot. The cord is brand new, so I know it's not missing anything. I was wondering if there is any type of rubber O-ring that can slip between the end of the mic and the female XLR plug to make that connection more secure. Do you sell anything like this?
To tighten the female XLR to male XLR connection, Shure offers a rubber washer that is corrugated. The washer diameter is 18 mm and it fits over the male XLR pins. The part number is 80A439 and is available from Shure Parts.