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...

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

There are several different air compressor cooling fan styles. Choose this if yours looks like this one. Replace if cracked or missing fins.