Duralumin Washer for Valve Spring Retainer
The washer’s OD must seat tightly into the bore, with exhaust grooves punched on both faces. Top and bottom edges get chamfered to prevent any gap, and a slot is added for gas escape.
Case Review
This part is machined from 6061 duralumin, 3 mm thick, with chamfered edges and grooves on both the upper and lower faces.