Yamaha BMS10A Microphone Stand Adaptor The BMS10A fits the 5/8 inch, 27-thread standard and comes with a 3/8 inch -16 European thread adapter. The BMS10A comes with two 5mm screws needed for mounting. Also works with discontinued products MG102C MG10/2, MG82CX, MG8/2FX, STAGEPAS 300 and the STAGEPAS 500