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 5925-01-160-7609
NSN 6220-00-202-8591
NSN 5985-00-284-6038
NSN 5895-00-959-2284
NSN 6220-00-558-2147
NSN 6620-00-120-0974
NSN 5915-01-437-1482
NSN 5895-00-137-1334
NSN 6620-01-023-2938
NSN 6145-01-250-2006
NSN 5920-01-212-0587
NSN 5945-01-215-0710