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Body Dia: 5/16"
Enhance your safety and performance with the Drill America - 9/16-48 UNS HSS Tap Set
Drill America - 2-3/4-8 UNS HSS Tap Set
Thread Size: m7
11/16" X 1/2" Pilots for Counterbore - High Performance & Durable Cutting Tool | Drill America Sets & kits Body Dia: 5/16"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 counterbore cutter, and a