An end cutting tool for forming a flat bottomed enlargement of the mouth of a previously formed cylindrical hole. It may have an integral or inserted pilot. Designed to be driven or turned by a wrench, carpenter's brace or handle. For power driven items, see counterbore, machine.
Classification: Drilling, threading or tapping tools and parts thereof, base metal
NSN 6110-01-246-2673
NSN 7035-01-229-0941
NSN 6150-01-423-7487
NSN 5835-00-286-5432
NSN 6620-00-104-6937
NSN 5895-01-573-9383
NSN 6620-00-897-3182
NSN 5975-00-454-9055
NSN 5950-01-650-1620
NSN 6650-00-842-5463
NSN 6130-01-221-7682
NSN 7035-01-328-7448