Nozzles Nozzles Pre-bored and preassembled discharge nozzles for PRO™227 Fire Suppression Systems. KEY FEATURES • Flexible size options from 1½“ to 2”• 180 ° or 360 ° models available. 360° 180° Size of Thread Product Codes Product Codes ½” B04612000 B04612001 ¾” B04612100 B04612101 1” B04612200 B04612201 1¼” B04612300 B04612301 1½” B04612400 B04612401 2” B04612500 B04612501