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Shure A99SMA Adapter Plate for SM99 and MicroFlex

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The A99SMA is used to cover the larger mounting hole required for the SM99. Once covered, the A400SM may be installed for use with a Shure MX400 series microphone.

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Product Specs

Outer diameter 3.012 inches
Diameter of hole in the middle 1.75 inches
Diameter of three outermost screw holes 0.17 inch; center of each is 0.25 inch inward from the outer diameter; screw holes are separated by 120 degrees; holes are countersunk to accept #8 flat head screw
Thread for three innermost screw holes #8-32 UNC-2B; used to fasten the Shure A400SM shock mount
Plate thickness 0.12 inch

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