Spacer adapter assy is used on conversion mod kit, axle. Consists of: plate  adapter (mat'l is .13-.34C plain carbon steel); (3) lug nuts; and (3) wheel  studs. Outside diameter is 216MM; thickness is 25.4MM. There are (3)  15.875MM holes with 24MM c, bore and (3) 12.7 mm holes with 30MM c'bore.  Phosphate coating and paint.