13/16" X 1/2" Pilots for Counterbore BoltsandNuts.com Tap Drill Size 2-21/32"

Tap Drill Size 2-21/32"

Size: 1-31/64"

permanent connection that can't loosen over time • Triple square (XZN) bit tip is machined to precise tolerances for strong engagement with fastener heads • Large

Part Number D/ARSD1-25/64

Part Number DWDTS1-1/4-3MT

13/16" X 1/2" Pilots for Counterbore BoltsandNuts.com Tap Drill Size 2-21/32"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