Horizontal glass mounted tubular level brass with black finish, 3-23/64" x 5/8" x 3/4". Mounting hole size is .125 x 2.
No other part numbers with same form, fit, and function found.
A sensitive instrument used to establish accurately the horizontal plane. It consists of a vial(s) in an enclosure which may or may not have mounting holes. It is mounted in or on a flat plate base. The vial may be graduated or plain.
Classification: Drawing, marking-out or mathematical calculating instruments, nesoi
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