This is a JIC closing plug with an external hexagon. Stainless steel 316 (1.4571) fittings have excellent corrosion resistance (better than stainless steel 304).
Specifications
Thread : UNF 7/16-20
Dash Size : 4
Connection type : Outer thread JIC
Material : Stainless steel
Max pressure at 20 °C (bar) : 310
Material connection 1 : Stainless steel
Material quality connection 1 : Stainless steel (1.4571)
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