M4 Threaded Shank Counterbore • HSS • Used to enlarge the opening of a hole to allow room for the head of a fastener List Number MC27504 Substrate HSS Package Quantity 1 Shank 6.0 Length 65.0 Flute Count 2 Bolt M4 Pilot Diameter 4.3 Pilot Length 5.5 Cut Length 12.5 Diameter 8.0 SKU: MC27504 Category: Counterbores Related products LGS8-1 Weldon Tu-Lip Conterbore Item #: CW90281 LGS14-1 Weldon Tu-Lip Conterbore Item #: CW90341 LGS14-2 Weldon Tu-Lip Conterbore Item #: CW90342