Fastener requirements applicable to all Ultra4 competition vehicles.
Section 2.16 • Common Vehicle Requirements
2.16.1
It is recommended that all component parts of the vehicle’s steering, suspension, chassis, drivetrain, and running gear be secured with S.A.E. Grade 8 or better or metric equivalent, fasteners. Male threaded fasteners (bolts, cap-screws, studs, etc.) should be secured with either: lock nuts, lock washers, cotter pins or safety wire and shall have at least one full thread showing through the nut.
