Tee of pig-iron 20 mm of VVV state standard specification 8948-75

The tee of pig-iron ravnoprokhodny 20 mm of VVV state standard specification 8948-75 with a female thread - a pipeline detail which are used for connection of pipelines of one diameter at what one pipe adjoins at an angle 90 degrees, and represents the hollow cylinder from cast iron with carvings at edges.