Shure UA505 Antenna Mounting Bracket Kit

The length of the longer bracket section, that has five holes, is 3.0" (76 mm).  This longer section has three holes for mounting screws.  Each screw hole has a diameter of 0.18" (4.6 mm).  There are also two holes for mounting on a mic stand: one hole has a diameter of 0.64" (5/8" - 16 mm) and one hole has a diameter of 0.38" (3/8" - 9.5 mm).

There are two shorter bracket sections, each having one hole; these sections form a 90-degree angle.  The length of each section is 1.66" (42 mm).  Each shorter section has a hole to mount a BNC bulkhead connector.  The diameter of each hole is 0.51" (13 mm).