hex coupler Diameter: 15/17mm Length: 40mm Weight: 295G Finish: black or galvanized Material: machine tooling Hex couplerTechnical Specifications: Diameter: 15/17mmLength: 40mmWeight: 295GFinish: black or galvanizedMaterial: machine toolingFull Range of Products:Our factory can produce all kinds of nuts with different threads and shapes, wing nut, tri-claw nut, round nut, hex nut, connector ( ...