Supplier: Upset forging connection. Machine: forging machine(gd-150), threading machine(gzl-45) oil pump; coupler: size from 12mm-40mm. The tensile strength can normally reach 627mpa, for special ones can reach above 800mpa. 2, cold stamping connection. Machine: yj-650, yj-800; coupler:size from 16mm-40mm. Tensile strength can reach 570mpa. 3, rib peeling connection. Machine:rib peeling machine; coupler: size from 16mm-40mm. Tensile strength can reach 570mpa.
