Tapper™ Drill Bits in the diameters listed are nominal size. 316" and 14" Perma-Seal™ Tapper™ anchors must be installed with special tolerance Tapper™ drill bits. 14" Stainless Steel Tapper™ anchors require the use of specific tolerance Tapper™ drill bits, which are gold or silver colored, to denote the standard size and special application size for harder materials. 38" diameter Tapper™ anchors should be installed with a 14" ANSI drill bit.
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