300-F-BR by Dixon Valve | Cam & Groove Adapter | Type F | 3" Adapter x 3" Male NPT | BrassSafety Notes: Dixon and Boss Lock cam & groove couplings do not interchange in the 1 2" & 8" size. Under no circumstances should cam and groove couplings be used for compressed air or steam service! Pressure rating is based on the seal of the mating part. Pressure rating recommendations are based on the use of mating Dixon fittings at ambient temperature 70F 21C with a standard seal installed. For use at elevated temperature or other unusual operating