Checkpoint® Loose Wheel Nut Indicator, 38mm, Torque COLOR OPTIONS | 100 PACKLoose Wheel Nut Indicator, 38mm, Torque Qty 100 Price For: 100 Pack Bolt Hole Spacing: 38mm Item: Loose Wheel Nut Indicator Material: PLASTIC Used For: 38mm Hex Nut Fitting Color Options: Red and Yellow An instant visual indicator of wheel nut movement Indicates possible faults with breaks or bearings through melting Melts at a specific temperature of 125C 257F Supports fleet safety checks Cost effective and easy to implement The world's first