The S2BBBPCA is a 3-pole 1/4-inch S2 Mono and Stereo Jack Socket with special nose. The S2 jack socket incorporates Ni-Ag? alloy self-cleaning contacts for superior performance and reliability. All models have a durable premium quality nylon body. Mounting hardware is normally supplied unassembled. The S2 jack socket is available with optional chassis grounding in mono or stereo with switched or make contacts and with a choice of either solder tag or six standard PCB mounting versions. Optional Kinked legs for snap-in PCB mounting on PC-A and PC-C styles to facilitate pre-assembly and wave soldering.