1″ Threaded Shank Counterbore • HSS • Used to enlarge the opening of a hole to allow room for the head of a fastener List Number MC27100 Substrate HSS Package Quantity 1 Shank 1" Length 6-7/16 Flute Count 2 Bolt 1" Pilot Diameter 1-1/32 Pilot Length 1-1/32 Cut Length 2" Diameter 1-11/32 SKU: MC27100 Category: Counterbores Related products LGS12-3 Weldon Tu-Lip Conterbore Item #: CW90323 LGS16-1 Weldon Tu-Lip Conterbore Item #: CW90361 LGS14-2 Weldon Tu-Lip Conterbore Item #: CW90342