Screw that fastens the front and back of the belt  guard to each other, and to the compressor base. THD FORMING

Old Part Numbers: AB-ACG18Saddle mount cup for the motor/pump feet. This installs on the mounting feet of the motor/pump assembly and keeps it from vibrating, as well as reducing noise.

Screw for the eccentric bearing assembly on crankshaft.

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

Old Part Numbers: A14877, N044990, SS-1286, 5130029-00, 5131153-001/4"-18 x 1" male NPT close pipe nipple. For model D55167 type 1 & 2 and others. Remember to apply plumber's tape to the threads.

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.