The BK1/HTC-140M is a beige/natural colored cover designed for use with the Eaton Bussmann series HTC-15M PCB fuse block. This cover provides protection and insulation for the fuse and terminals on a printed circuit board. It has an overall length of 22.6 mm, a width of 13.5 mm, and a height of 5.5 mm. As an accessory for the HTC-15M fuse block, which accommodates 5 mm fuses, it is used in various PCB applications to enhance safety by preventing accidental contact with live components. The 'BK1' prefix indicates that this product is supplied in a bulk package of 1000 pieces.