The 01550020ZXU is a 1-fuse heavy-duty in-line mount Bayonet Knob Holder with black thermoset body. The contact rivet is made up of brass with tin plating and designed to accommodate 14AWG stranded wire. It is suitable for use with the 1/4 x 1-1/4-inch 3AG/AB SFE 20 fuses. Both body and knob have a 0.2-inch diameter hole for insulated wire. It features wire leaded holder terminal.