Countersunk screw DIN 963 M2x10 + lock nuts (4pcs)

Small detail, big difference: secure fastening in every assembly

In the world of slot racing and modelling, small hardware elements can determine whether a set holds up on the track or disassembles at the least opportune moment. The countersunk screw DIN 963 M2x10 is a classic reference with a metric size of 2 and a length of 10 mm, featuring a recessed head that allows for a clean, flush finish with the surface. Combined with lock nuts (self-locking nuts), the joint withstands the vibrations typical of competition and continuous use.

Features and function

• DIN 963 standard: countersunk slotted screw, an internationally recognised standard widely used in precision hardware.
• M2 metric, 10 mm length: suitable size for fastenings in chassis, bodies, mounts, and small format components.
• Lock nuts included: each screw comes with its self-locking nut, preventing progressive loosening due to vibration without the need for adhesives.
• Pack of 4 units: practical quantity to have spare available at the workbench.

Applications in slot racing and modelling

The M2 metric is one of the most common in 1/32 and 1/24 scale slot assemblies, as well as in static models, figures, and dioramas. The countersunk head is particularly useful when it is necessary for the screw to be recessed in the piece, preventing it from protruding and interfering with the movement or adjustment of other parts of the assembly. The lock nut adds an extra layer of security against the vibrations generated by the track or the transport of the vehicle.

Assembly and usage tips

• Ensure that the housing is properly countersunk before inserting the screw, so that the head is flush without forcing the material.
• Tighten the lock nut until you feel the resistance of the nylon insert: a high torque is not necessary for plastic or resin parts.
• Store any leftover units in a component organiser; their small size makes them easy to lose at the workbench.

Frequently asked questions

What is the difference between a lock nut and a standard nut?

The lock nut incorporates a nylon insert inside that generates additional friction on the screw, preventing it from loosening due to vibrations or impacts. In slot racing and modelling applications, where parts are subjected to constant movement, this feature extends the life of the fastening without the need for adhesives like Loctite.

Is M2x10 a common size in slot chassis?

Yes. The M2 metric is very common in 1/32 scale chassis and bodies, both in factory original assemblies and in homemade modifications. The length of 10 mm allows it to pass through several layers of material with enough margin for the lock nut to function correctly.

Can I reuse the lock nut multiple times?

Lock nuts can be reused a limited number of times. With each disassembly, the nylon insert loses some grip capacity. For critical assemblies or if you notice that the nut no longer offers resistance when tightening, it is advisable to replace it with a new one.

What tool is used to tighten M2 slotted screws?

Flat-head screwdrivers with a fine tip are used, adapted to the width of the slot of the M2 screw. For more comfortable and precise work, watchmaker or modelling screwdrivers with ergonomic handles facilitate torque control without damaging the screw head.

The CXM364 pack contains four DIN 963 M2x10 countersunk slotted screws with nylon insert lock nuts, an essential fastening solution for slot car chassis assembly, static model kits, and diorama building. The self-locking nuts prevent loosening caused by vibration during racing or transport, making this small hardware kit a reliable choice for hobbyists working at 1/32 and 1/24 scale. A practical addition to any modeller's or slot car builder's workbench.