All stainless steel fittings have a single notch identification mark on the hexagonal corners

P/N 30200-C

It additionally reduces pull out stress on the pump bung

Threaded swivel adaptor

Zeeline ZED-101 - 5" X 5" Air Sentry Breather wrench All stainless steel fittings have5" X 5" Air Sentry Breather Description: D Series Air Sentry Breathers: The D Series breathers feature numerous models in a variety of sizes, designed to satisfy the requirements of most stationary fluid management applications. The breathers provide application flexibility by using 100% silica gel for moisture adsorption or 100% activated carbon for fume and odor control, or both when necessary. All D Series models feature 2 micron solid particle