3/4" X 3/8" Pilots for Counterbore Quantity:1 Metric Stainless A2-70 Button Socket

Metric Stainless A2-70 Button Socket Head Cap Screws w/ 40 Hole Bin

Tap Drill Size 7/16"

Metric Hex Nuts Zinc Plated

Thread Type UNS

3/4" X 3/8" Pilots for Counterbore Quantity:1 Metric Stainless A2-70 Button SocketProduct 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