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 5998-01-110-3503
NSN 2925-01-254-3068
NSN 4140-00-085-1355
NSN 5945-01-430-4557
NSN 5985-00-157-4932
NSN 6130-01-123-4126
NSN 5975-00-525-2331
NSN 6645-00-664-4665
NSN 6240-01-393-5945
NSN 5990-01-393-2278
NSN 6130-00-575-5923
NSN 6620-00-488-0626