Bell & Gossett impeller lock washer for B&G Series 1535 pumps, sizes 351-357.Used On:168021 Series 1535 351S 1/3HP 115/230168022 Series 1535 351T 1/3HP 208-230/460168023 Series 1535 352S 1/2HP 115/230168024 Series 1535 352T 1/2HP 208-230/460168025 Series 1535 353S 3/4HP 115/230168026 Series 1535 353T 3/4HP 208-230/460168027 Series 1535 354S 1HP 115/230168028 Series 1535 354T 1HP 208-230/460168034 Series 1535 357S 1HP 115/230168035 Series 1535 357T 1HP 208-230/460179X13 Series 90 2AA Bronze Fitted 1/2 Seal179XX1 Series 90 1AA Bronze Fitted 1/2 Seal179XX5 Series 90 1-1/4AA Bronze Fitted 1/2 IN.179XX9 Series 90 1-1/2AA Bronze Fitted 1/2 IN.P10323 Bearing Assembly (SS Teflon)P10324 Bearing Assembly (SS Viton)172X21MF Series 60 1X1X5-1/4 All Bronze BTO / 172X21172X22MF Series 60 1X1X5-1/4 Bronze Fitted BTO / 172X22172X23MF Series 60 1-1/4X1-1/4X5-1/4 All Bronze BTO / 172X23172X24MF Series 60 1-1/4X1-1/4X5-1/4 Bronze Fitted BTO / 172X24172X25MF Series 60 1-1/2X1-1/2X5-1/4 All Bronze / 172X25172X26MF Series 60 1-1/2X1-1/2X5-1/4 Bronze Fitted BTO / 172X26172X27MF Series 60 2X2X5-1/4 All Bronze BTO / 172X27172X28MF Series 60 2X2X5-1/4 Bronze Fitted BTO / 172X28172X29MF Series 60 1-1/2X1-1/2X6-1/4 All Bronze / 172X29172X30MF Series 60 1-1/2X1-1/2X6-1/4 Bronze Fitted BTO / 172X30172X31MF Series 60 2X2X6-1/4 All Bronze / 172X31172X32MF Series 60 2X2X6-1/4 Bronze Fitted BTO / 172X32172701MF Series 60 601S Inline Pump 1/4HP 1750 115/208-230/1/60172702MF Series 60 602S Inline Pump 1/3HP 1750 115/208-230/1/60172703MF Series 60 603S Inline Pump 1/2HP 1750 115/208-230/1/60172707MF Series 60 604S Inline Pump 1/4HP 1750 115/208-230/1/60172708MF Series 60 605S Inline Pump 1/3HP 1750 115/208-230/1/60172667MF Series 60 606S Inline Pump 1/2HP 1750 115/208-230/1/60172712MF Series 60 607S Inline Pump 1/3HP 1750 115/208-230/1/60172713MF Series 60 608S Inline Pump 1/2HP 1750 115/208-230/1/60172668MF Series 60 609S Inline Pump 3/4HP 1750 115/208-230/1/60172717MF Series 60 610S Inline Pump 1/2HP