Lug Nut Lock Washer (Pair) - 21 MM

Replacement Lug Nut Lock Washer Pair – 21 mm for Nanrobot D4+ 2.0, D4+ 3.0, D6+, RS7, LS7 & LS7+ Electric ScootersEnsure your scooter’s motor axle nuts stay firmly in place with this pair of 21 mm lock washers, designed for Nanrobot models. These lock washers provide additional torque resistance, helping to prevent loosening from vibration during rides. Ideal for replacing worn, rusted, or missing washers as part of routine maintenance or wheel servicing. Features: Compatible with Nanrobot D4+ 2.0, D4+ 3.0, D6+, RS7, LS7 & LS7+ scooters Includes 2 lock washers sized for 21 mm axle nuts Provides added security against nut loosening Helps maintain axle stability and wheel safety OEM-spec design for a proper, secure fit