These 7/16 to N adapters are very popular in DAS and Cellular systems. Usually they are rated to 6 ghz. Many have low pim specifications. Some 7-16 to Type N Adapters here are IP67 rated. The N to 7/16 adapters here use the current P287 standards committee hex, 32mm. 7/16 DIN to N adapters are usually brass, but for test systems sometimes stainless steel is preferred.