Keystone Electronics Corp. TO-5 Socket-4pins 4591

The 4591 is a TO-5 transistor socket with four pins, designed for direct PCB mounting. It features closed-entry, sleeve-type contacts that accept leads between 0.016 and 0.020 inches in diameter, or 0.010 by 0.018 inch rectangular leads. The insulator is made of glass-filled polyester rated UL 94V-0, and the contact pins are brass with tin-lead plating. The contact springs are beryllium copper with a minimum 0.000030 inch gold plating. The socket includes eyelets for lead termination and has a mounting hole pattern with two 0.218 inch diameter holes for secure placement.