0.562" hole diameter 5.125" overall width material non-asbestos. bolt holes centered on an isosceles triangle with 12.125 in. base by 3.875 in. altitude
0.406" hole diameter 29.250" overall length 18.000" overall width 32 bolt hole quantity material non-asbestos. dovetail joint on each corner 0.250 in. deep non-circular