Manufacturer 시리즈 = 3126 Tube Size = 4mm Material = Polymer Blanking Plug. A blanking plug for blanking off push-in connectors. Features and Benefits. Full bore design Exceptionally low leak rate Available with BSPP and BSPT threads Suitable for Vacuum or pressure applications ISO 14743 compliant Date coded for traceability and reliability Automatically seals in both dynamic and static situations