supply of half geared coupling no. of teeth -30 noshalf geared coupling no. of teeth -30 nos,half geared coupling no. of teeth -30 nos, flange outer dia-170 mm, thickness o f flange -16 mm, hub outer dai- 110 mm , hub length -31 mm, number of fixing holes -06 nos. (h ole diameter - 12 mm), pitch circle diameter of fixing holes -140 mm, pilot hole -30 mm ,materi al- medium carbon steel as per is:1875/1992 class- 5 and hardness of geared portion in the g ear coupling shall be more than 250 bhn with material test certificate from nabl govt. approverd agency. [ warranty period: 30 months after the date of delivery ] ] => limited