9/16" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Individually Labeled and Poly Bagged

Individually Labeled and Poly Bagged

They are Black and gold surface treated and the length between the chucking slot on the shank to the end of the shank is standard 3/8"

Part Number: 62C650HSBA325PL/PT

4 mm exposed (and 11

Part Number: BIT-T/A54884

9/16" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Individually Labeled and Poly BaggedProduct 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