Suction Flange Packing for Koshin 2" 3" & 4" engine trash pump 2" 3" & 4" BSP male final thread for KTH-50x KTH-80x & KTH-100x engine trash pump . OEM part No (KTH0-50x) 0115780 (KTH-80x) 0115692 (KTH-100x) 0118261 Fits all Koshin trash pump kits WT20 Honda etc