Spring for air regulator. This is the spring that installs directly into the plastic regulator knob, on top of the diaphragm.

Air compressor regulator repair kit includes the diaphragm with o-ring, small spring, and valve with o-ring. 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: 032-0001, 032-0056Pressure gauge.

Old Part Numbers: SRV250175, 1229O-175Air compressor safety relief valve, 1/4" MPT, 175 PSI, ASME. If your valve leaks below the pressure listed on the side of the valve, replace this vital safety feature.Specifications MPT Inlet: 1/4 in. FPT Outlet: 3/8...

1/4" body x 1/4" male NPT Industrial Steel Coupler for air compressors.