Just as the pictures show posted earlier. 3/4 hex nut. 7/16 stud. 70 to 73 on camaro z28. In 1974 they changed design. They are used on other GM car lines also such as 71 72 chevelle ss share them. Also I've seen them on 69 hurst olds. Very rare to find on any car, even survivor cars. They were not made well and the jacketed caps came off. Usually discarded early in life on most cars.
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1970 L78 camaro Cortez silver ralley sport under restoration
1970 L78 camaro cranberry red standard black interior original drivetrain.
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