Profile: Keystone Electronics Corp, is a manufacturer of interconnect and electronic hardware components. We are an ISO 9001:2000 certified company. Our product line includes brackets, electronic hardware & accessories, fuse clips & fuse holders and transistor hard wares compounds. Our PCB quick-fit female terminals are vertically & horizontally mounted quick-fit female receptacles. They are easily mounted and soldered to the PCB, versions are available to accept and reliably mate with either 0.110" (2.8mm), 0.187" (4.8mm), 0.205" (5.2mm) or 0.250" (6.4mm) size male terminals. Our PCB button & spring battery contacts are designed for PCB packaging applications. Keystone's new button and spring contacts are ideal for top-side board mounting of " A", "AA", "AAA" and "N" size cells.