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 6135-01-508-6083
NSN 6240-01-013-8895
NSN 6650-01-512-1930
NSN 5935-01-045-2702
NSN 5935-00-305-4873
NSN 5835-01-321-7895
NSN 5999-01-087-9070
NSN 2925-00-660-8131
NSN 7035-01-364-8454
NSN 5925-00-550-4946
NSN 5996-00-089-0895
NSN 5960-01-376-3880