Home » Tools & Home Improvement » Best What Size Drill Bit For A 5/16 Tap Best What Size Drill Bit For A 5/16 Tap bestreviewtech November 5, 2019 Tools & Home Improvement SaveSavedRemoved 0 Deal Score0 502 Deal Score0 502 DCT Metric Drill Bit Guide Centering Punch 8-Piece Center Drilling Set Kit – 4mm to 12mm Bushings, Locating Pin, Guide 10 Total Score Excellent Best what size drill bit for a 5/16 tap: Top-Rated Brands & What to Buy User Rating: 4.02 (501 votes)