The Brown & Sharpe 599-920 series steel matched pairs of parallels are for measuring, marking, or positioning machined metal work. The steel construction helps reduce wear and corrosion. All four sides are hardened, ground, and finished to exceed government specifications for flatness and squareness. The pair is parallel to + or – 0.0001″. Parallels 6 in. long are parallel to + or – 0.0001″
Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, is headquartered in North Kingstown, RI.