25/64" X 5/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 it is precisely heat treated

it is precisely heat treated for superior strength and protected by a corrosion-resistant manganese phosphate finish

Tekton 1/2 inch drive deep 12-point sockets are an exact fit for double hex fasteners and also work with hex and square shapes

Width: 17-13/16"

A4-70 Stainless Steel Hex Nuts

Part Number: BIT-KFDRSD3/8X41/64

25/64" X 5/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 it is precisely heat treatedProduct 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