NSR M3 Allen replacement tip

Restore your NSR key to the precision of day one

The NSR Allen M3 replacement tip (ref. NSR4423) is the official spare part for the Allen keys from the Italian brand, designed to ensure that your preparation and tuning tools are always ready. A small detail, yes, but when a worn tip starts to slip in the screw head, fine bench work becomes a source of errors that no tuner wants to face.

Function and performance

NSR designs its tools with the same attention to detail that it applies to its chassis, motors, and transmissions. This Allen M3 tip is calibrated to fit snugly into the corresponding brand key, guaranteeing the exact torque you need when working with small-format screws, common in motors, mounts, guides, and transmission assemblies of competition slot cars.

• Size: Allen M3
• Compatible with the NSR Allen key of the same system reference
• Original NSR spare part — factory fit and tolerances
• Prevents damage to screw heads from using worn tips

Compatibility and assembly

This tip is designed as a direct replacement for NSR Allen keys. If you regularly use M3 screws found in chassis, mounts, or motor fixings of NSR cars, having a spare tip in your workshop drawer is a precaution you will appreciate at the least opportune moment: before a track session or while preparing a car for a club championship.

Common mistakes

The most common mistake is to continue using a worn tip to "not stop work." The result is often a damaged screw head that is then very difficult to remove without forcing the chassis or the part that houses it. Changing the tip in time is always the most economical and least frustrating option.

Frequently asked questions

Which NSR key is this tip compatible with?

It is designed as a replacement for NSR Allen keys that use an interchangeable tip in size M3. If you have doubts about the specific model of your key, you can consult us before placing your order.

Can this tip be used with keys from other brands?

As an original NSR spare part, the fit is optimised for the brand's own keys. Its compatibility with third-party tip holders will depend on the clamping system of each tool.

When should I change the Allen tip?

When you notice that the tip starts to slip in the screw head, shows visible wear on the edges, or has suffered any impact that may have deformed it. Working with a damaged tip deteriorates screws and hinders precise tuning.

Why is it important to use original NSR tips?

Original tips guarantee factory tolerances and the appropriate steel for working with the small-format screws commonly found in competition slot cars. A generic tip may not fit with the same precision and increase the risk of damaging screw heads.

The NSR Allen M3 replacement tip (ref. NSR4423) is an original spare part for NSR Allen keys, ensuring precise torque when working with M3 screws on slot car chassis, motor mounts and guide assemblies. An essential workshop tool for serious slot car builders and club racers looking to keep their NSR tools performing at their best.