10mm steel aftercooler bolt for B5900/HP51 air compressor pumps.

Bare head for B5900 air compressor pump. Order head gasket separately.

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...

Connecting Rod Assy. Does NOT include 6222726100 Insert Bearings. Order 2 per rod if needed!

Old Part Numbers: 046-0256, 5940301Also available in the B5900Head Gaskets (4 head gaskets) or 53N0056 Gasket Kit (complete gasket kit).  We recommend ordering the gasket kit, as it will save you money and will ensure that you have all of...

Old Part Numbers: 8227103, 048-0043Does not include rings.