bs903-093 4x4mm Steel Nylon Insert Locknuts (6pcs)

This product is a set of 4 × 4 mm steel nylon‑insert locknuts used to secure threaded fasteners in hobby RC cars, trucks, and buggies where vibration resistance is important. The nylon insert (nyloc) helps prevent the nut from backing off under torque and rough terrain by gripping the screw threads, making these locknuts ideal for suspension, steering, chassis, and accessory mounting points. These are metric locknuts that match M4 screw hardware in many Redcat Racing and similar vehicles, and this 6‑piece pack provides enough spare parts for multiple mounting points or routine maintenance.

Features:

• Six 4 × 4 mm steel locknuts with nylon insert

• Nylon insert resists loosening from vibration and shock

• Steel construction adds strength and durability

• Works with M4 screws in RC suspension, chassis, and components

• Ideal for high‑vibration RC running environments

• Useful as replacement hardware for maintenance or rebuilds

• Compatible with Redcat Racing and other hobby RC models