The BK/HKX is a panel-mount indicating fuse holder designed for 1/4" x 1 1/4" fuses. It is rated for 20 amps and operates at 22-33 Volts AC. This model features an amber incandescent lamp that illuminates when the fuse opens, providing a clear visual status indication. The holder is vibration-resistant, includes a flat-sided knob, and can be mounted on panels up to 3/16" (4.8 mm) thick. Its robust design and indicating feature make it ideal for various electronic equipment applications where quick fault identification is necessary.