278821A2 New Regular Rotor Bar Fits Case-IH Tractor Models 1640 1644 1660 +One New Aftermarket Replacement Regular Rotor Bar that Fits Case IH Tractor Models: AFX8010, 1640, 1644, 1660, 1666, 1670, 1680, 1688, 2144, 2166, 2188, 2366, 2377, 2388, 2577, 2588, 5088, 6088, 7010, 7088, 7120, 8010, 8120 Chrome Alloy, w o Spike, 1 2" x 1 1 4" NC Bolt Size Replaces Part Numbers: 278821A2, A 278821A2, O Fits International HarvesterNS2CA, 1968743C1, 1968743C2, 1309336C1, 1309336C2, O Fits International HarvesterNS2H, 1309336C13,