Sigma's Screw-In Connectors are used to terminate FMC to a 1/2-in knockout in a dry location box or enclosure. These die-cast zinc connectors are suitable for steel Conduit, and they mount flush to maximize the capacity inside the box. Terminates steel FMC to a 1/2-in knockoutFor 3/8-in steel FMCScrews into conduitApproved for use in dry locationsZinc die-cast constructionProduct is UL and CSA listed