US$ 34.99
Size m28 x 1
Width: 12-11/16"
5/16"-18 Grade 8 Hex Cap Screws
Tap Drill Size 1-5/32"
Part Number: BIT-DMS73-4012
15/16" X 1/2" Pilots for Counterbore Quantity:1 Size m28 x 1Product 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