1" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Alloy Socket Head Cap Screws

Alloy Socket Head Cap Screws Black Oxide

Class 8 Split Lock Washers Zinc

Part Number: Assortment Kit #150115 Pieces - Coarse Thread

Part Number DWC5-530-502

1" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Alloy Socket Head Cap ScrewsProduct 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