... : 14-40mm Thread Pitch:2.5mm,3.0mm,3.5mm rebar coupler with threading rolling end Materials: 45# carbon steel. ... Specifications: D14mm-40mm. Usege: rebar splicingISO:9001 NameValueBrandLangruiModelLRThread Pitch2.5mm,3.0mm,3.5mmThread Angle75 ... GD-150 Upset forging machine to enlarge the end of rebar.Secong, use GZL-45 Threading machine to process screw on ...