A precision master reference tool used as a standard for setting micrometer calipers and snap gages; also in setting up and checking comparators. It consists of a flat steel disk, or a cylinder, precision ground and lapped to size.
Classification: Drawing, marking-out or mathematical calculating instruments, nesoi
NSN 5999-01-566-7202
NSN 6145-01-278-0593
NSN 5920-01-027-7373
NSN 6130-00-304-4827
NSN 5835-01-363-4527
NSN 5985-01-317-8677
NSN 6130-00-153-3136
NSN 6220-00-572-3790
NSN 6145-00-204-5992
NSN 5925-00-203-1278
NSN 6145-01-559-2050
NSN 5999-00-920-0512