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 5925-01-142-1996
NSN 6610-01-646-1609
NSN 6135-00-145-8884
NSN 5945-01-160-2355
NSN 5950-01-652-3667
NSN 5996-01-239-4120
NSN 6130-01-334-2153
NSN 6320-00-994-0179
NSN 5835-01-459-7428
NSN 6650-01-411-6292
NSN 5945-01-019-1910
NSN 5925-01-425-0959