The ACJM-MHDR is a 2-pole horizontal snap-fit PCB 1/4-inch (6.35mm) mono Phone Jack with plastic housing, a metal nut and an entry bore. The M series mono phono jack has black UL94V-0 PBT modified PPO resin connector shell and Santoprene cable bushing. The standard heavy-duty contacts provide excellent signal performance and the rugged designs excel in professional audio applications.