31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Thread Size: 3/8"-16

Thread Size: 3/8"-16

reducing wear

Part Number: 100C250SHB307Z

Shank Size: Q

Part Number DWTSR112-3827

31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Thread Size: 3/8"-16Product 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