These bus bars have four 3/8″ studs and six #8-32 machine screws. Bus bars act as a central hub, allowing you to connect multiple electrical components without creating a hazardous mess of wires. Made from a nickel-plated brass bar, these bus bars won’t tarnish or oxidize, a leading cause of connection failure. The bolt hardware is type 316 stainless steel and will not rust even in marine environments. A plastic cover is included to prevent accidental contact to exposed surfaces. Two holes and screws are provided for mounting.