WABCO part numbers starting 533

533065	Compression ring	WABCO
533134	O-ring	WABCO
533320	I directional valve	WABCO
533416	Gasket, 2 in OD ring (valve, a-1 charging cutoff pilot)	WABCO
533417	Gasket valve	WABCO
533580	Head, nonpressure (cylinder, brake)	WABCO

Not listed? Add it yourself.