12 HOLE REFERENCE STANDARD 7075-T6 aluminum. Hole Sizes: 25/64(.390), 13/32(.406), 27/64(.421),7/16(.437), 29/64(..453), 15/32(..468), 31/64(.484),1/2(.500), 33/64(.515),17/32(.531), 35/64(.546), 9/16(.562). EDM NOTCH: .030" X. 030" x.005" ±.001" WIDE...
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