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 5985-00-130-8066
NSN 5935-01-080-4404
NSN 6620-01-497-3744
NSN 6130-01-025-2574
NSN 5895-01-370-3351
NSN 5975-01-576-9061
NSN 6105-01-422-0510
NSN 5895-01-251-8547
NSN 5925-01-272-9577
NSN 5915-00-005-0313
NSN 5960-01-034-6537
NSN 6650-01-458-4174