Help with installing '70 rocker panel molding

Discussion in 'Body Restoration' started by Gtrexler1, Aug 1, 2017.

  1. badazz81z28

    badazz81z28 Veteran Member

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  2. COPO

    COPO Veteran Member Lifetime Gold Member

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    This is the sheet metal screw that is off my 70 Z28.
    #4 item in the diagram.
    IMO, those flat end bolts in the pkg are probably for a different car and GM reused that part # for the Camaro once they ran out of stock of the pointed black sheet metal screws.
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    Low mile Z.
    IMG_6121.jpg
     
    Last edited: Jan 12, 2021
  3. badazz81z28

    badazz81z28 Veteran Member

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    What size pitch is that screw? It actually looks larger than what comes in the OER kit and closer to the oversize screw that was used on my car (after the original ones were stripped).
     
  4. COPO

    COPO Veteran Member Lifetime Gold Member

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    Thread pitch or thread count is used only on machine thread fasteners (those that take a nut or thread into a tapped hole)
    and not a sheet metal screw. A sheet metal screw is identified by a #.

    The thread thickness of this screw is 0.185, 3/16” (4.70 mm), the nearest is a #10 sheet metal screw.
    The total length is 0.629.5, 5/8”, 16 mm
    Head takes a 5/16” socket and the head has a shoulder.
    Hope this helps.

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  5. badazz81z28

    badazz81z28 Veteran Member

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    I appreciate it, odd it’s a #10. Maybe mine was a #10 and someone put smaller ones in...hence why they seemed stripped out and I put #10s in.
     
  6. Knucklehead

    Knucklehead Veteran Member

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    Agree with COPO. Just took the rocker moldings off my 70 SS350 yesterday, and they had chrome sheet metal screws at the ends and the small hex-head sheet metal screws attaching the bottom. Interesting that one (only) of the hex-head bolts had an attached shake-proof washer, and the right side molding was missing two bolts (no evidence it ever had any). Fine craftmanship.

    Not a low-mileage car, but I have owned it since January 1971, and the moldings have never been removed.
     

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