1-1586040-4 is a 4-position vertical pin header assembly designed for PCB mounting applications. It features a UL 94V-0 rated white nylon housing with pegs and 0.25 inch thick copper alloy contacts for reliable electrical connections. The header is constructed with a 165 (20) centerline spacing and includes recommended PCB board layout dimensions of 4.70 ±0.08 inches [1.185 ±0.03 mm] for proper installation. The assembly is RoHS compliant and suitable for wire-to-ear connector systems requiring robust, high-density interconnections. Common applications include industrial control systems, telecommunications equipment, and consumer electronics where reliable multi-position connections are essential.