1/2" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Waterproof Insert with Polyester Lining

Waterproof Insert with Polyester Lining

Ideal for plumbing and mechanical work

Part Number DWT54846

Part Number: BIT-DWDCON

1/2" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Waterproof Insert with Polyester LiningProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and