M2x6mm Screws for Body - Flat Heat - for Allen 1.3mm (black)

BRM-S421A Screw Set: Body Mounting with Flat Head and Black Finish

When assembly matters as much as performance, every screw counts. The reference BRM-S421A brings together what is necessary in body screws: M2 metric, 6 mm length, flat head (Flat Head) to sit flush with the surface, and driven by a 1.3 mm Allen key. The black finish makes them almost invisible on dark bodies and provides an aesthetic touch consistent with competition preparations.

Technical Features

• Metric: M2
• Length: 6 mm
• Head Type: Flat Head (flat, countersunk head)
• Drive: 1.3 mm Allen key
• Finish: black
• Brand / Reference: BRM – BRM-S421A

Function and Performance

The countersunk flat head allows the screw to sit completely flush with the body upon installation, eliminating any protrusion that could interfere with aerodynamics or simply look visually out of place. This type of head is common in meticulous preparations, where the goal is to make the joint between body and chassis as clean as possible.

The M2x6mm size is the standard used in BRM models, designed to provide a secure fastening without the risk of damaging the body mounts due to excessive length or torque.

Compatibility and Installation

This screw set is designed for BRM models that specify body mounting with this standard. Before installing them, it is advisable to check that the housing in the body is properly countersunk so that the flat head sits well and does not remain under tension.

A 1.3 mm Allen key is required for tightening. We recommend using a quality key with a good grip to avoid rounding the internal hexagon, especially with screws of these small dimensions.

Common Mistakes

• Using an incorrect size Allen key (e.g. 1.5 mm) and rounding the hexagon.
• Over-tightening: with M2 it is easy to exceed torque and damage the plastic of the mount.
• Not countersinking the body hole if it is not factory-prepared for a flat head, causing the screw not to sit properly and the body to be raised at that point.

Frequently Asked Questions

How many units are included in the BRM-S421A package?

The manufacturer does not publicly specify the exact quantity per bag in the available information. We recommend contacting us directly or checking the packaging upon receipt, as BRM typically packages its screws in standard lots.

What size Allen key do I need for these screws?

You need a 1.3 mm Allen key. It is a small size; make sure to use a quality key to avoid damaging the hexagon.

Does the flat head sit completely flush with the body?

Yes, as long as the body hole is properly countersunk. The Flat Head geometry is designed for that: to be flush with the surface without protruding.

Can I use these screws on other models or brands other than BRM?

As they are standard M2x6mm screws, they can technically fit into any M2 housing that accepts a countersunk head. However, they are designed and catalogued by BRM for their own models; always check compatibility with the specific housing of your car.

Is the black finish painted or is it the colour of the base material?

We do not have detailed information from the manufacturer regarding this. If this detail is relevant to your project, we recommend contacting us and we will verify it with BRM.

BRM-S421A M2x6mm flat head countersunk screws for slot car body mounting, black finish, 1.3 mm Allen key drive. An essential small part for clean and precise BRM slot car assembly, keeping the bodywork flush and secure on the chassis.