Littelfuse FLM-15 FLM015, 15Amp 250V Cartridge Fuse Dimension: 0.41"" Dia x 1.5"" L (10.3 x 38.1mm) Cylindrical Midget TIME DELAY 15A 250V This Littelfuse FLM- 15 could be used to substitute for Bussmann FNM-15 (FNM15) and Ferraz Shamwut/Mersen TRM-15 (TRM15)