1-1/8" X 7/16" Pilots for Counterbore Shopify Collective Grade A Hex Jam Nut

Grade A Hex Jam Nut

Color: Purple

External Thread: 1/2"-13

Reinforcements

Part Number DWDDL18X31/64

1-1/8" X 7/16" Pilots for Counterbore Shopify Collective Grade A Hex Jam NutProduct 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