BUSSMANN BK/HTB-44I-R (HTB-44I) Cartridge Fuse Holder. For 6x30mm (1/4 in x 1-1/4 in) Fuses. Rt. Angle Panel Mount. Quick Connect. Withstands 15 to 20 Lb-In torque to mounting nut when mounting fuse holder to panel. High temperature, flame retardant,