Secure components quickly and easily with the Advance / Clarke / Viper Thumb Nut – Part #VF81210 (2 Pack). These replacement thumb nuts are designed for tool‑free tightening and adjustment, helping simplify maintenance and equipment setup. Fits Clarke Models CA30 17E, CA30 20B, & CA90 32T Walk-Behind Scrubbers. Fits Viper Models FANG 18C, FANG 20, FANG 20HD, FANG 26T, FANG 28T, & FANG 32T Walk-Behind Scrubbers. Fits Advance Models AS430C, AS510B, AS5160-US, AS5160T-US, & AS5160TO-US Walk-Behind Scrubbers and Models AS530R, AS710R, & AS850R Rider Scrubbers.Overload Sales Group is Your Source for All Things Clean!