29/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Shank Size 25/64"

Shank Size 25/64"

Part Number: BIT-T/A54891

Grade: Class 45H Alloy

These bits are essential for efficient and accurate fastening in construction

Tekton 3/8 inch drive shallow external star (E-Star) sockets are made from 50BV30 steel that's hardened to 40–47 HRC for strength and durability

29/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Shank Size 25/64"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