1-1/8" X 1/2" Pilots for Counterbore Quantity:1 Drill Size: 27/64"

Drill Size: 27/64"

Part Number: EZ-31270

0x20 Hex Flange Bolt Smooth Head Free Spin Conical Washer Off Road Moto Hardware Zinc - 4PCS

Size 1-9/16"

1-1/8" X 1/2" Pilots for Counterbore Quantity:1 Drill Size: 27/64"Product 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