Cres, ams 5513 or ams 5515 per united aircraft specification hs 178, 1.170 in. Min, 1.210 in. Max o/a lg, 0.500 in. Min, 0.540 in. Max o/a w, 0.750 in. Center to center distance between holes along length, 0.186 in. Min, 0.192 in. Max 2 bolt hole dia, chamfer 45 degrees porm 5 degrees by 0.125 4 places