scaffold coupler 1. Size:48.3mm*48.3mm 2. Weight:1kg-1.5kg 3. EN74, BS1139 4 . manufacturer scaffold coupler 1) Dimensions: 48.3 x 48.3mm (1 29 / 32" x 1 29 / 32" )2) Material: drop forged carbon steel3) With T-bolt4) Nut sizes: 17mm, 19mm, 21mm, 22mm, 23mm5) Styles: standard, flanged6) Standards: BS1139 (1982 & 1991), EN74 class A & B7)Product surfaces can be self-colored, galvanized, gold color ...