Rebar Coupler The splicing couplers model is divided into 9 categories according to the Rebar Coupler. (Unit: mm) 1).The parameter of couplers Size(mm) O D�±0.5ï¼?mmï¼? Threadï¼?mmï¼? L�±0.5 (mm) Pitch Rib peeling coupler weight/pc (kg) Thread Angle �¦16 25 M16.5 40 2.0 0.111 60 Degree �¦18 28 M18.5 45 2.5 0.136 �¦20 31 M20.5 50 0.175 �¦22 33 M22.5 55 0.203 �¦25 37 M25.5 60 0.266 �¦28 41 M28.6 70 3.0 0.375 2).The Characteristics of the Usage Mode usage occasion Standard Model used in the occasion for connecting the steel bar in normal situation Different Diameter Model used for connecting the steel bar in different diameters Flared Model used for the steel bar which was hard to match Positive And Negative Screw Thread Model Used in the occasion when the steel bar in the two sides both can not be turned but the lengths can be adjusted. Locking Nut Model Used when the steel bar can not be turned, then it turns the splicing coupler to join the steel bar and then lock the splicing coupler with the locking nut. 3).The material of the splicing coupler The material of the splicing coupler is constructional quality steel of No.45 steel.