1-1/16" X 5/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Grade 8 Fine Thread Hex

Grade 8 Fine Thread Hex Head Cap Screws ASME B18

Part Number: 75X350DPPOAPL

Part Number D/ASP1/2

Tekton 1/4 inch drive 12-point sockets are an exact fit for double hex fasteners and also work with hex and square shapes

Part Number: Assortment Kit #347574 Pieces - Coarse Thread

1-1/16" X 5/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Grade 8 Fine Thread HexProduct 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