23/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Works with friction ring and

Works with friction ring and detent pin anvils

Steel Rivet Nuts Zinc Yellow

Part Number: 31C275ASBSS

Tap Drill Size 1-11/32"

Part Number: EZ-303-4

23/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Works with friction ring andProduct 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