Arlington Industries 835708 1/2 in. Non-Metallic Screw-In Liquid Tight Connector

Built-in gasket maintains liquid-tight seal Dimensions: 0.525 in. x 1.535 in. Trade size: 1/2 in. Knockout size: 1/2 in.You may also like Arlington Gf864 Ai Gf864 1 1/4" Emt Flex Combination Coupling Compression Screw Conduit (10 Pack).