Slot Raised Countersunk Machine Screws

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Used a 14 endmill to mill the slot then a 12 82* 6 flute countersink to mill the slot No fuss, worked great Just watch out

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aztec idols slot Product, Brass Woodscrews Countersunk Slot 8 x 1 12 Part, 24059 Brand Product type, Brass Slotted Countersunk Size, 8 Diameter, 8 Gauge  Home · Fasteners and Fixings · Stainless Steel Fasteners · A2 Stainless Steel Countersunk Slot Machine Screw A2 Stainless Steel Countersunk Slot Machine