Double Density 2-Part PCB Connector, screwless. The Weidmüller B2L/S2L is a two part PCB connector, offering double density in standard 3.5mm pitch. Saves 30% space compared to connectors using 2.5mm or 2.54mm pitch. No special tooling required Easy handling compared to 2.5 & 2.54 pitches Highest available wiring density for single wires