Must order quantity of 4 for complete set. 

Air filter for air compressor with universal filter style with 1/2" mounting threads and includes replaceable air filter element. Replacing your air filter element when it is dirty will increase the efficiency of the pump and increase the life of the air...

Old Part Numbers: D23574Set of 2 bolts, .375-16 X 3.40 UN.

1/2" compression nut and sleeve, brass.

Old Part Numbers: 5130038-00, 5130024-001/4" OD brass nut and sleeve for bleeder (unloader) tube for air compressors.

Universal Regulator: 4-port, two 1/4" FPT ports, and two 1/8" FPT ports (gauges sold separately here). The regulator controls the amount of air in your air compressor hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks...