DIN 985 M2 self-locking nut (10 pcs)

The nut that doesn’t move, even if the car does

The self-locking nuts DIN 985 M2 are a classic reference in precision fasteners: they incorporate a nylon insert on the top that generates additional friction when tightened, preventing the nut from loosening due to the continuous vibrations that slot and model assemblies are subjected to. This pack contains 10 units, sufficient for several projects or to always have a reserve in the workbench.

Features and function

• DIN 985 standard: low hexagonal nut with self-locking nylon insert, designed to prevent spontaneous loosening.
• M2 Metric: the most common thread diameter in slot chassis fasteners, motor mounts, guide supports, and model assemblies.
• Pack of 10 units: a practical quantity to have on hand for any preparation or assembly session.
• Metal material with an integrated nylon insert in the upper area of the nut.

Compatibility and applications

The M2 metric is ubiquitous in the world of slot and scale modelling. These nuts are particularly useful in:

• Securing motor mounts in slot chassis (both universal track and Sport track).
• Holding guide supports, body stops, and handmade suspension elements.
• Repeated assembly and disassembly of parts in resin or technical plastic chassis where conventional screws tend to loosen with use.
• Static model assemblies, figures, and dioramas where secure fastening of small metal parts is required.

Assembly and usage recommendations

Being self-locking, these nuts offer greater resistance to tightening than a standard nut: it is normal to feel more friction when screwing, precisely because the nylon is doing its job. It is recommended to use a suitable wrench for the M2 hexagon or a fine-tip pliers for a clean and controlled tightening. Do not over-tighten: the required torque for M2 fasteners is very low and the nylon insert already guarantees retention.

Although the nylon insert allows for multiple uses, in critical applications — such as competition mounts subjected to constant vibrations — it is recommended to replace the nuts if it is noticed that they have lost locking tension.

Frequently Asked Questions

How many times can a DIN 985 self-locking nut be reused?

In general, the nylon insert withstands several cycles of assembly and disassembly without losing effectiveness. For competition applications where reliability is critical, it is prudent to renew them if it is detected that the locking has decreased. Coming in a pack of 10, you will always have a spare available.

What is the difference between a DIN 985 nut and a normal DIN 934 nut?

The DIN 934 is a standard hexagonal nut without a retention element: it can loosen due to vibration. The DIN 985 incorporates a nylon insert that generates additional friction, maintaining the tightening even under continuous vibrations, something very common in operating slot motors.

Are they compatible with any M2 screw?

Yes, they are compatible with any M2 metric screw and standard pitch. Ensure that the screw or stud has M2 metric threads before using them.

What modelling applications are they useful for?

They are useful in any assembly involving M2 fasteners: slot chassis, mounts, static models with metal assemblies, supports in dioramas, or any project where loosening due to vibration or frequent handling is to be avoided.

The DIN 985 M2 nylon insert lock nut (pack of 10, ref. CXM382) is an essential fastening component for slot car chassis preparation, motor pod assembly, guide mounts and static scale model builds. Compliant with DIN 985 standard, the nylon insert prevents loosening under vibration — a must-have for any serious hobbyist or club racer working with M2 screws. Compact, reliable and ready for repeated use across multiple builds.