Old Part Numbers: 68-4-21/8" male NPT x 1/4" compression adapter for air compressor unloader/bleeder line. A very common adapter to attach the 1/4" OD unloader/bleeder line from the unloader valve on the pilot valve to the pump head.

Screw for the plastic motor/pump shroud.

Screw for the eccentric bearing assembly on crankshaft.

Isolator for the pump/motor assembly base. NOTE: To replace all of them you will need to order a quantity of 3. Keep your compressor from vibration damage and replace if any are missing.

O-ring Seal for the discharge (outlet) tube to the pump head.

Old Part Numbers: 1/4XHEXNIPPLE BR, 1/4XHEXNIPPLE STBrass 1/4" male NPT x 1.5" long hex pipe nipple for air compressors. A very common part used to connect accessories like the regulator, pressure switch (etc.) to a manifold.

Must order quantity of 4 for complete set. 1/4"-20 x 1-1/4 length.

Air compressor cylinder ring and o-ring kit. Includes compression ring, head o-ring, and valve plate o-ring.  This tends to be a high-wear part, especially if you are in a high-particulate environment. Pro Tip: Order the cylinder when buying this...