jacktop

noun

1. The top of a jack.

   “The links should be provided with flexible leads which can be plugged into a pair of jacktop insulators mounted near the coil jack strip.”

   “For general laboratory use output may be taken from four insulated jacktop terminals on standard 3 in. spacing mounted on the front.”

   “A small butterfly spring between the side of the jacktop and the hammer butt replaces the familiar spring under the jack heel.”