1" X 1/4" Pilots for Counterbore Shopify Collective Part Number D/AMMCO17

Part Number D/AMMCO17

Part Number: 100C200HSBA325PL/FT

Part Number: BIT-DWTMHX10X1

Part Number TSC1/2-D

1" X 1/4" Pilots for Counterbore Shopify Collective Part Number D/AMMCO17Product 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