Sta-Rite U36-112ZP, Locknut 1/2 , for use with 1/2, 3/4 HP, Model BFH50, FH50, FH50S, FHP50, FH75, FND-L, FNC-L, HLC?L, HLD?L, HLE?L, HMSD-1FL, HMSE-1FL, HMSF-1FL, MSC?7, MSD?7, MSE?7, MSF?7, MSG?7, PLB-2L, PLC-2L, PLD-2L, PLE-2L, PLF-2L, Series FH, FN