1½" dia. Glass Target in Steel Ring Mount
The 6150 multiple paired-line glass target, with horizontal and vertical displacement scales, is mounted in a hardened and ground-stabilized steel ring. It is centered within 0.0005" with respect to the ring's outside diameter. This target is useful when you need to measure or estimate deviations from a line of sight which exceed an optical micrometer's range. The graduations on the target act as "scale" and may be read using the optical micrometer as a vernier in much the same way that optical tooling scales are read.
National Stock Number: NSN-6920-00-X11-1495.
The displacement scales on the glass are graduated up to 0.300" on each side of zero (above). The large divisions read 0.050", and the smaller ones, 0.010".
