1957 C1 exhaust hanger bolts

[Dan P.]

What are the markings on the heads of the exhaust hanger bolts . Fine or coarse thread . Thanks

[Adam S.]

Re: 1957 C1 exhaust hanger bolts

Mine had " L " head marks with 5/16" corse threads attaching the rubber insulators to frame brackets with " E " 1/4" corse head bolts attaching metal brackets to frame, hope that helps

[Gary C.]

Re: 1957 C1 exhaust hanger bolts

Dan, these bolts nuts are from the AIM Section 8 sheet 1. # 106325 (view B) is only used for this application in '57 and we've seen UR & L head marks. #119034 (view B) is a carriage bolt either plain or W and only used for this application in '57. #120854 (view A) have seen UR, L, or TR. #120854 is used multiple places in '57. Gary....