15/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com corrosion-resistant layer that preserves tip

corrosion-resistant layer that preserves tip geometry and doesn’t chip or flake off

Size m20 x 1

Grade 8 FINE Hex Head Cap Screws

Ideal for hard metals

and other materials

15/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com corrosion-resistant layer that preserves tipProduct 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