Bunn CDS Knurled screw for lid. Sold as a set of two.  For parts diagram use link http://www.partsguru.com/user/CDS3%20Parts%20Manual%2029422%200000%20(2).pdf

The Best slush machine.CAB Skyline quiet and efficient slush machine.

For routine maintenance of Slush machines:

1- Lubricate moving parts, seals and gaskets. It extends life of parts.

2- Keep condenser coil clean for maximum ventilation. It extends the life of compressor.

3- Avoid serving over-frozen product and prevent damage to expensive gear motor and plastic parts.

4- CLICK HERE  to purchase the NSF Approved Food Grade Lubricant for lubricating moving parts and seals. Sanitize product contact parts with NSF approved Stera Sheen Green sanitizer every two weeks.