Vibration Dampening U-Bolt Vibration-Damping U-Bolt Steel Finish Zinc Plated Thread Size 1/4 In.-20 Thread Length 1 13/64 in Inside Length 2 3/64 in Length (In.) 2 5/16 in Inside Width 1 51/64 in Characteristics Cushion Design Provides Total Load Distribution Includes Cushion Two Nylon Lock Nuts U-Bolt