Used to join or align 2 shafts within motor or mechanical system, ReliaMark rigid couplings are manufactured in SAE 1008 mild steel and come in 60+ sizes with ¼–1 ½ in. bore. Products include solid set-screw, one-piece (single-split), and 2-piece (double-split) couplings. All feature black oxide finish and socket head cap screws. Effective on hard and soft shafts, couplings offer bore tolerances of +.001/.003.