1-1/16" X 5/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number: 100C300SHCSABO/USA

Part Number: 100C300SHCSABO/USA

29 Piece Set comes in a round

Measures Pop Rivet Diameter's 3 (3/32") through 8 (1/4")

Part Number: DUR013-95

2035 PCS - Zinc Clear Finish

1-1/16" X 5/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number: 100C300SHCSABO/USAProduct 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