0.180" hole diameter 9.620" overall length 3.430" overall width within gasket is another rectangle with 2 sides common to gasket; length 5.225 in n/m, width 1.867 in nom; aperture length 4.765 in nom, aperture width 1.407 in nom; inner corner rad .12 in nom; 6th bolt slot center is 4.740 in nom from bolt slot center on one side rectangular