DOP532138059 AYP/Sears/Craftsman Lawn Mower Steering Sector Gear Assembly No. 531165701. This is a quality aftermarket part Shaft is 3/4 wide and 3" tall. This is an OEM part that replaces husqvarna part numbers 168501, 532187039 and 187039,138059, 532138059, 532-13-80-59, 531-16-57-01, 531165701 and 531168501.