Hayward SPX1600PN Swivel Nut & Knob for Super Pump
This swivel nut and knob is designed to use with Hayward SuperPump models SP1600X5, SP1605X7, SP1607X10, SP1608X10, SP1610X15, SP1611X15, SP1615X20, SP1616X20, SP1621X25 and also compatible with Hayward MaxFlo pump model SP2810X15.