Kochek 1.5" NH nozzle 20 to 60 GPM with bumper. Dual gallonage jump and constant flow abilities. These nozzles just need a simple turn to easily adjust from a straight narrow stream to a fog.
This nozzle will only fit a 1 1/2 inch hose with NH or NST threads.
NH or NST: National hose or national standard thread is often referred to as “fire hose thread” as this is by far the most common thread in use today by fire departments.