Old Part Numbers: SSF-3158-1This is the screw that holds down the piston cover, on the top of the piston.

Order this if ordering valve plate or a new head.

Muffler Single Cylinder

Screw to bolt the fan to the motor, .250-20 x .750 U.

Note: recommend ordering kit K-0650. This kit includes a comp ring, seal and a new cylinder sleeve which should be replaced over time if scratched or damaged. Replacing the comp ring only may not fix the unit.Specifications1.89 ID X 2.54 OD

Must order quantity of 4 for complete set. 1/4"-20 x 1-1/4 length.

Old Part Numbers: Z-AC-0032, AC-0032Valve plate comes with preinstalled valves and o-rings. Poor performance or air leaks out of the intake filter while the unit is running? This is probably the problem.