Universal Regulator: 4-port, two 1/4" FPT ports, and two 1/8" FPT ports (gauges sold separately here). The regulator controls the amount of air in your air compressor hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks...

Old Part Numbers: PS3030RVUnloader Valve used on many Furnas / Hubbell brand air compressor pressure switches includes the unloader valve with compression nut and sleeve, and screw. Replace this part if it leaks while the unit is running. If this part...

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.

Screw to fasten the handle to the compressor base.

Old Part Numbers: AC-0008-2, Z-AC-0008-2, AC-0008 OEM Switch.

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

Screw that fastens the front and back of the belt  guard to each other, and to the compressor base. THD FORMING