Rubber o-ring for air compressors, .362ID x .103W. This is the o-ring seal for the pump end of the outlet tube.

Old Part Numbers: N021229Air Compressor Piston / Cylinder Kit includes the Piston / Rod Assembly with bearing, cylinder cup, and O-rings for model D55127 type 3 and others. This kit is used on many different units, from DeWalt to Bostitch to Craftsman...

If your valve is leaking on the side of the switch do not order this part. Order check valve instead.

1/4" male NPT x 1/8" female NPT brass bushing reducer for air compressors.

Poor performance or air leaks out of the intake filter while the unit is running? The valve plate assembly is probably the problem.