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 5975-01-268-1529
NSN 5998-01-425-2185
NSN 5985-00-807-3723
NSN 6145-01-097-8341
NSN 6150-00-353-7392
NSN 5945-01-263-1859
NSN 5945-00-296-5876
NSN 5950-00-161-4419
NSN 5835-00-905-7165
NSN 5965-01-390-6725
NSN 6645-00-312-2752
NSN 5999-01-118-0677