Littelfuse KLK-15 KLK015, 15Amp 600V Cartridge Fuse Dimension: 0.406"" Dia x 1.500"" L (10.30mm x 38.00mm) Cylindrical Midget FAST ACTING 15A 600V This LITTELFUSE KLK-15 could be used to substitute for BUSSMANN KTK-15 (KTK15) and Ferraz Shawmut/Mersen ATM-15 (ATM15)