Slide Plate 541620 Side plate for Singer 20U Series Part No 541620 Its function is be an inspection plate, & viewing plate. 1.The operator can slide the plate to (usually) the left,to view the spool case in place in the hook & Base. 2.Once the slide plate is open the operator can view how to locate the spool case correctly with in the Hook & Base. 3.With the Slide plate open the operator can view if the machine has cotton jammed in the sewing mechanism. (cotton locked) All with out tipping the machine back, which is a much more unsafe operation.
