... the specifications for the round hole, staggered 60 (trangle pitch) Hole: 0.3, 0.4, 0.5, 0 ... 32"2.38mm5/32"0.040", 0.063"1.02mm, 1.60mm33.00%7/64"2.78mm3/16"0 ... 0.063", 0.125"0.81mm, 1.02mm, 1.27mm, 1.60mm, 3.17mm40.00%1/8"3.17mm7/32"0.032"0 ... 0.040",0.050", 0.0630.81mm, 1.02mm, 1.27mm, 1.60mm50.00%3/16"4.76mm3/8"0.040 ... "1.02mm23.00%1/4"6.35mm5/16"0.063"1.60mm58.00%1 ...