Koswork 3x20mm Hex Hardened Steel RC Screw Set - KOSSS320

The Koswork KOSSS320 is a set of 3x20mm hardened steel hex set screws designed for use in RC car builds and repairs where a secure, load-bearing fastener is needed. Set screws — also known as grub screws — are headless M3 fasteners that thread fully into a component to lock parts in place without protruding, making them a practical choice for motor pinions, wheel hubs, and similar applications. Koswork manufactures these from hardened steel to resist stripping and deformation under the stresses typical of RC car use.

Key Features

• M3 thread diameter with 20mm length — a commonly needed size across many RC car platforms
• Hardened steel construction resists cam-out and deformation during installation and under load
• Hex drive socket for use with a standard hex key or allen driver
• Set screw (grub screw) profile — fully threaded with no head, seats flush or recessed into the component
• Comes in a reusable storage container, keeping all eight screws organised in your parts box

What's Included

• 8x 3x20mm hardened steel hex set screws
• Plastic storage container

What You Need

• Appropriate hex key or allen driver to fit the set screw socket size