As the manufacturer has informed us,
Shock number 985-24-117 should have hardware bag number 803-02-033 which has a bushing and sleeve when installed on the rear of the 2005-2018 Tacoma, 6-lug trucks. The bushing has an inside diameter of .625″ / 15.875 millimeter which houses the sleeve with a .478″ / 12.7 millimeter inside diameter. For six lug (4X4 or 2X4 Pre-Runner) 2005-2018 Tacoma trucks, the lower rear shock mount bolt has been .50″ / 12 millimeter and the sleeve and bushing in shock number 985-24-117 is designed to accommodate the factory mounting bolt. If the bolt is .375″ (3/8″) / 9.52 millimeter, the hardware included in the shock box will not accommodate the smaller bolt as it was designed to work with the .50″ / 12 millimeter bolt the 2005-2018, 6 lug trucks were equipped with.