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23/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank - High Performance & Durable Cutting Tool | Drill AmericaCounterboring 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

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Choose the Drill America - 1-1/16-27 UNS HSS Bottoming Tap for unmatched reliability and performance

reducing weld cracking and ensuring high-quality results in every application

flat on the other

All Pipe Taps furnished with a 2-1/2 to 3-1/2 thread chamfer NPT threads require the use of a sealer like teflon tape or pipe compound

UL Certified: Each piece in the VolCore® line is UL certified

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fire-resistant fabric to endure high temperatures

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