Ametric&reg; 083 ISO, Connector Link for, Single Roller Chain, 46 CL (9076) Ametric&reg; Part No., 12.7 mm Pitch(P), 4.88 mm (b1), 7.75 mm (d1), 12.9 mm (I), 1/2x3/16 , 4.09 mm Pin Dia,(1-005)