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 6620-01-361-8685
NSN 6685-01-585-4664
NSN 6320-00-110-8005
NSN 7035-01-633-9537
NSN 6130-01-326-0336
NSN 5960-01-622-0393
NSN 4140-01-394-5286
NSN 5835-00-372-3736
NSN 4140-01-530-8450
NSN 5975-00-452-1197
NSN 5905-01-450-8554
NSN 5925-01-597-1967