A tool of various shapes and design used primarily for checking the point angle of twist drills or as a standard for accurately grinding the point on twist drills. Some types may be used as a hook rule, plain rule, depth gage, height gage, try square, level, slide caliper, countersink gage, or any combination thereof. A portion of the tool, or a combination of assembled parts forms either a 59 degree or a 118 degree angle. See also square, double.
Classification: Other measuring or checking instruments, appliances and machines, nesoi in chapter 90
NSN 6620-01-222-0143
NSN 5990-01-501-9094
NSN 6240-01-212-5567
NSN 5990-00-761-9160
NSN 5835-01-034-1255
NSN 7035-00-981-7216
NSN 5999-00-363-3435
NSN 5965-01-530-8875
NSN 6320-00-476-6898
NSN 6145-01-507-6561
NSN 5905-00-905-6446
NSN 6685-01-565-9049