Sheet updated September 2026
The Track Nut brass QM rail nuts (4 pieces) are the sliding nuts for Duotone foil top plates in the Quick Mount version, starting from SS24. They slide into your board's rail, ready to receive the screws from your foil top plate. Brass is the material of choice for a very specific reason: it won't weld to aluminum when exposed to salt, unlike a stainless steel nut that eventually seizes and spins uselessly in the rail.
KEY INFORMATION
TRACK NUT BRASS QM RAIL NUTS (4 PIECES) - Duotone spare part
What we like
- Brass, not stainless steel: The brass-aluminum pairing prevents seizing. This ensures you can easily remove your top plate six months down the line.
- In fours: This is the perfect quantity for a complete top plate, or to keep as spares.
- Quick Mount version: These nuts are specifically designed for the QM mounting system on Duotone foils, starting with the SS24 generation.
- The part that stops everything: A seized or lost nut means you can't mount your top plate. It's the cheapest and most frustrating breakdown you can have.
- Original part: These feature Duotone threading and dimensions, not just any hardware store nut.
Included / Not included
✔️ Included: 4 Track Nut brass QM rail nuts
❌ Not included: Screws, Foil top plate, Board
DETAILED DESCRIPTION
Why brass?
A nut lives in an aluminum rail, submerged in seawater, tightened against a screw. With stainless steel, galvanic corrosion takes its toll, and the assembly seizes. When you try to disassemble it, the nut spins in the rail without unscrewing, forcing you to saw it off. Brass prevents this scenario, which is why it's the material of choice.
When to replace them
Replace a nut whenever it resists your wrench, its imprint is marked, or a turn of the screw feels stiff. A nut costs a few euros, but a foil top plate ripped off mid-flight costs significantly more. Rinse your rail with fresh water and disassemble it at least once per season.
FAQ - Duotone Track Nut Brass QM Rail Nuts (4 pieces)
No, this version is specific to the QM mount from SS24. For a classic mount, the product code is different; we also have it.
No, only the four nuts are in the bag.
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