Old Part Numbers: D20763, D27254, D206434-Port OEM Air Regulator. The Regulator controls the amount of air to your hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks.   

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

Air compressor check valve. 3/8" Comp x 1/2" MPT with 1/8" FPT side port.  The check valve is a one-way valve that prevents air from back-feeding from the air tank. If your unit has a hard time restarting when trying to cycle or your pressure switch...

Order this if ordering valve plate or a new head.

Screw, #10-14 x 2.50". This is the screw for the air intake muffler cover (2 used).

Screw (fastener) for the motor/pump shroud.

Old Part Numbers: AC-0558Grip for the air compressor handle, .875" diameter.