Did anyone else see this???

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CCR 2009.6 (revised 3/23/09)

15.18 Lug Nuts - All competition vehicles must use open type wheel lug nuts with enough threads exposed to be able to double nut each of the wheel studs with a minimum of 4.5 threads exposed. If aircraft style lock nuts are employed a minimum of 4.5 threads must be exposed and the requirement for double nutting is waived.

-=- Todd