... machines. Pressure washer parts canbe identified by the nozzle "number", a four or five digit number that is stamped on the nozzle, which ... . In all cases the first two digits of the nozzle number indicate the spray angle (disperse) in degrees.EXAMPLE: 00 is ... is 40 degree. The last two digits of the nozzle number indicate the orifice size, a standard industry designation. EXAMPLE: 06 ...