KRC 10122 000 GM Steering Box Fitting, 16mm to -6 Male AN (Steel) KRC 10123 000 GM Steering Box Fitting, 18mm to -6 Male AN (Steel) KRC 10124 000 GM Steering Box Fitting, 5/8” to -6 Male AN (Steel) KRC 10125 000 GM Steering Box Fitting, 11/16” to -6 Male AN (Steel)