Metric Screws ø3.8 x 9.2mm Cone Head

Precision in every tightening: metric screws ø3.8 x 9.2 mm countersunk head for slot

In the preparation of a slot car, the screws are not a minor element. A screw with the exact measurements and the appropriate geometry ensures clean fixings, without play or unnecessary tension in the chassis or assembled components. The reference BRM-S134A2 meets this need with very specific dimensions: diameter 3.8 mm and length 9.2 mm, with a countersunk head for a flush fit that does not interfere with adjacent parts.

Function and performance

The countersunk head of these screws allows them to sit flush or slightly recessed in the mounting surface once tightened. This is especially useful in areas of the chassis where clearance is limited or where a protruding head could rub against the body, the shell, or any other structural component of the car.

• Diameter: ø3.8 mm
• Length: 9.2 mm
• Head type: countersunk (recessed)
• Reference: BRM-S134A2

Assembly and preparation

To achieve the best result with countersunk screws, it is recommended that the housing is properly countersunk in the receiving material. A clean countersink ensures that the head sits evenly, distributing the tightening load without deforming the part. Use a screwdriver with the appropriate tip for the screw head and apply a moderate tightening torque: over-tightening on plastic or resin parts can cause cracks or deformations that compromise the rigidity of the assembly.

Common mistakes

• Using screws of incorrect length, which can cause them to protrude on the opposite side or not provide sufficient thread grip.
• Not properly countersinking the housing, causing the countersunk head to not sit well and be unstable.
• Over-tightening on soft materials, which can melt or crack the material around the hole.

Frequently asked questions

What type of car or assembly is this screw intended for?

It corresponds to the BRM screw range, so its main application is in the chassis and assemblies of that brand. However, as it is a standard metric size (ø3.8 × 9.2 mm), it can be used in any assembly that requires exactly those dimensions and a countersunk head.

What is the difference between a countersunk head and a flat or cylindrical head?

The countersunk head (also called recessed) is designed to sit flush with the surface once tightened, provided that the housing is countersunk. The flat or cylindrical head, on the other hand, sits above the surface. The choice depends on the available space and the need for no protruding material in that area.

How many units are included in the package?

The provided information does not specify the exact number of units per bag or package. We recommend checking the product description in the store or contacting our team to confirm it before placing your order.

Do I need any special tools for assembly?

You only need a screwdriver with the appropriate tip for the type of head (generally Phillips or Torx, depending on the specific screw) and, if the housing is not already countersunk from the factory, a countersink drill of the correct angle. Without these conditions, the countersunk head will not sit properly.

BRM-S134A2 metric screw ø3.8 × 9.2 mm countersunk head — a precise fixing component for slot car chassis assembly and tuning. Ideal for BRM slot car preparation, compatible with any build requiring this exact metric size. Available at Ministry of Hobby, your reference store for slot car parts, model kits and high-end collectibles in Spain and Europe.

Information not found

It has not been possible to confirm the exact manufacturing material (steel, stainless steel, others), the type of head drive (Phillips, Torx, flat…) or the number of units per sales unit, as these are not stated in the provided information. If you need this data for your project, please contact us and we will confirm it.