Topaz 643S – 1″ Steel Set Screw Type Coupling – (10 Pack)

The Topaz line of EMT couplings feature set screw type assembly and provide secure, concrete tight protection when taped to connect ends of thin wall EMT conduit together. Featuring built to last steel construction with zinc plating; available sizes from 1/2” to 4”; 2 1/2” to 4”, suitable for use with both EMT and rigid conduit. Easy to secure diverse screw head ensures solid connection with a slotted head screwdriver. Most sizes UL listed and NEMA FB-1 compliant.