Aluminum alloy, qq-a-367, composition 2014, temper t6, 3.220 in.W, two 0.249 in. Min, 0.251 in. Max diameter holes inline fork end two 0.046in. Diameter holes fork end, 2.625 in. W between forks, one 2.500 in. Diah ole opposite end spaced 4.350 in. From center to fork holes, 1.1883in. Min, 1.1888 in. Max diameter bushing hole in fork bottom