M18 Threaded Shank Counterbore • HSS • Used to enlarge the opening of a hole to allow room for the head of a fastener List Number MC27518 Substrate HSS Package Quantity 1 Shank 25.0 Length 147.0 Flute Count 2 Bolt M18 Pilot Diameter 19.0 Pilot Length 19.0 Cut Length 44.5 Diameter 30.0 SKU: MC27518 Category: Counterbores Related products LGN4-1 Weldon Tu-Lip Conterbore Item #: CW90041 LGN4-2 Weldon Tu-Lip Conterbore Item #: CW90042 LGN10-2 Weldon Tu-Lip Conterbore Item #: CW90102