Holley 26-57 Dashpot and Solenoid Bracket Mounting Locknut Go to amazon.com Related posts The 8 best solenoid lock system FeatureKeeps throttle solenoid or dashpot attached securelyHex size measures 1-1/4"Thread size measures 7/8"-14 DescriptionThis bracket mounting locknut is designed to hold the solenoid or dashpot in place. It has a 1-1/4 hex size with a 7/8-14 thread size.