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 6645-00-922-8312
NSN 6105-01-394-5721
NSN 4140-00-155-8012
NSN 6645-01-624-7088
NSN 6610-01-198-3862
NSN 5930-01-232-8044
NSN 2925-00-066-9700
NSN 5935-01-503-2371
NSN 6620-01-089-4416
NSN 5998-01-026-1453
NSN 6645-00-842-3567
NSN 4140-01-453-7935