Screw kit

All the NSR fasteners you need, in a single kit

Wasting time searching for the right screw in the middle of a preparation session is something every slot enthusiast has experienced at some point. The NSR1239B screw kit solves that problem at its root: a complete pack with the most common sizes from the NSR range, ready to have on the workbench or take to the club.

Kit contents

The NSR1239B includes the following parts:

• 4 axle screws
• 3 medium springs
• M2x3 screws (standard head)
• M2x3 screws (smaller head)
• M2x4 screws
• M2x6 screws
• M2x8 screws
• M2x10 screws

Function and performance

Axle screws are critical components in any serious preparation: they hold the rear axle assembly with just the right pressure to prevent unwanted play or rigidity that can hinder driving. The medium springs allow for adjusting the tension of the guide or the contact pressure of the braids depending on the type of track and track conditions.

The variety of M2 lengths — from 3 to 10 mm — covers virtually all fastening needs in chassis, mounts, motor supports, and bodies within the NSR range. Having the exact length prevents incorrect tightening that can damage the chassis plastic or leave parts loose.

Assembly and preparation

To get the most out of this kit, keep the following in mind:

• Always use a flat or Torx screwdriver of the appropriate size for each M2 screw to avoid damaging the head.
• Axle screws should be tightened with a moderate torque: excessive tension can block the free rotation of the axle.
• Medium springs are compatible with the most common NSR guide systems; check the tension on the track before each session.
• Store the kit in a separate compartment or a small organiser box: the sizes are similar and mixing them slows down any intervention.

Compatibility

This kit is designed for the NSR chassis and spare parts range. Since NSR uses standardised M2 metric in most of its cars and parts, the different included lengths fit a large part of its competition and preparation models. If you have questions about a specific application, consult the assembly manual or the parts list of the corresponding model.

Frequently asked questions

How many screws of each size does the kit include?

The official information indicates 4 axle screws and 3 medium springs. The exact quantities of the M2 assortment (M2x3, M2x3 smaller head, M2x4, M2x6, M2x8, and M2x10) are not specified individually in the manufacturer's data.

Are they standard metric screws or NSR proprietary?

They are standard M2 metric screws, although they are prepared and calibrated for NSR assemblies. In general, they are compatible with conventional M2 tools.

What are the medium springs in the kit used for?

Medium springs are commonly used to regulate the pressure of the guide on the track or the tension of the braids, contributing to more stable driving and better electrical contact.

Can I use this kit on cars from other brands?

M2 screws are standard metric, so in theory, they can be used on other cars or chassis that use the same metric. However, the kit is formulated and recommended for the NSR range.

What tool is used to mount these screws?

NSR M2 screws typically require a small flat screwdriver or, depending on the head type, a 1.5 mm hex key. Check the specific head type of each part before intervening.

The NSR1239B screw full kit is the essential fastener set for any serious slot car preparation bench. It includes 4 axle screws, 3 medium springs, and a complete assortment of M2 screws in six lengths — M2x3, M2x3 smaller head, M2x4, M2x6, M2x8, and M2x10 — covering virtually every assembly need across the NSR range. Whether you're tuning a competition chassis or doing a full rebuild, this NSR hardware kit keeps you ready at all times.