13/16" X 3/16" HSS Aircraft Counterbore 1/4" Shank - High Performance & Durable Cutting Tool | Drill America Pipe Clamps Overall Length: 127

Overall Length: 127

Constructed from carbon steel

Choose the Drill America - 3/4-12 UNS HSS Bottoming Tap for unmatched reliability and performance

Size: 2-5/8"-16

13/16" X 3/16" HSS Aircraft Counterbore 1/4" Shank - High Performance & Durable Cutting Tool | Drill America Pipe Clamps Overall Length: 127Counterboring 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 counterbore cutter, and a