Duralumin Washer for Valve Spring Retainer
The washer’s outer diameter must be precisely fitted into the body, with grooves needing to be punched on both sides for exhaust. Chamfering the top and bottom to avoid gaps, slotting for exhaust.
Case Review
This product is made of duralumin 6061, 3mm thick. The upper and lower planes are chamfered and grooved.