11/16" X 5/16" Pilots for Counterbore Quantity:1 Part Number: assortment-kit-489306 Pieces -

Part Number: assortment-kit-489306 Pieces - Coarse Thread

Hook & Loop Gauntlet Closure

Part Number ANC5-530-254

Flute Length: 3-1/16"

Two Head Styles – The double box ends are the same size and both are 12-point

11/16" X 5/16" Pilots for Counterbore Quantity:1 Part Number: assortment-kit-489306 Pieces -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