A binding post is a versatile connector that allows a temporary or semi-permanent connection between electronic devices or circuits.

The contact surface clamp washer, against which the wire or lug is clamped by the head, is an integral part of the stud and not a force-fitted separate washer.  This avoids possible electrolytic corrosion across the mating faces due to current through the interface and subsequent increase in noise, galvanic EMF and resistance.  The cross-hole is drilled at right angles to a key-flat on the clamp washer in the screw machine, assuring absolute angular alignment of the finished post to the keyed flat in the instrument panel. Press-on base washers can have a much as five or ten degrees of angular misalignment.

The behind-panel backup insulting washer is made of solid plastic, which reduces cost and increases insulation from flashover voltage of the post.

A flat metal washer is provides as a bearing surface for the nut against the backup washer.  This washer can be used without the insulating backup washer, if it is desired, to ground the post to the panel.