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What Size Pilot Holes are Used for Bolts that Attach the Dual Cam # RP66074 Frame Plates


What size pilot hole for the self tapping screws?


Expert Reply:

If you are speaking of the screws used to fasten the dual cam frame plate, the hole size will depend on whether you have a tubular steel or C-Channel frame. If you have the tubular frame, you'd drill a 7/16 inch pilot hole, or a 17/32 inch hole if you have a C-Channel frame.

The tubular steel frame would use the self-threading bolts, and the C-Channel frame would be through-bolted. You can see this on page 6 and 7 of the instructions I've linked.

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expert reply by:
Mike L

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