1-1/8" X 7/16" Pilots for Counterbore Shopify Collective Class 10 Flat Washers Zinc

Class 10 Flat Washers Zinc

9 Hex Serrated Flange Nuts JIS B1190 Zinc Clear

Color: Purple

Grade A Hex Jam Nut

External Thread: 1/2"-13

1-1/8" X 7/16" Pilots for Counterbore Shopify Collective Class 10 Flat Washers ZincProduct 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