Armstrong M6 Generic Titanium T Nut Set-Countersink Head

The Armstrong M6 Generic Titanium T Nut Set with Countersink Head is a four-piece foil track hardware kit designed for securing a hydrofoil mast to a board. Manufactured by Armstrong Foils, the set pairs titanium T-nuts with M6 countersunk Torx-head screws made from 316L stainless steel. The countersunk screw profile sits flush with the board surface, providing a clean, low-profile finish compared to the dome-head alternative Armstrong also offers. Armstrong uses titanium and marine-grade 316L stainless across its hardware line to resist saltwater corrosion and maintain reliable clamping strength over time.

The "Generic" label in the product name indicates that this set is built for standard foil track systems rather than being exclusive to one Armstrong mast or board generation. That makes it a practical replacement or upgrade option for riders running track-mount foil setups that accept M6 T-nut hardware.

• Thread size: M6
• Screw type: Countersunk (CSK) Torx head
• T-nut material: Titanium
• Screw material: 316L stainless steel
• Quantity: 4 T-nuts + 4 screws
• Drive type: Torx

This hardware set suits any foiler — from intermediate to advanced — who needs to replace worn mounting hardware or wants to upgrade from standard stainless T-nuts to a lighter, more corrosion-resistant titanium option. Riders in saltwater environments will benefit most, since titanium resists seizing and corrosion far better than lower-grade alloys. The countersunk head variant is particularly relevant for riders who prefer a flush deck surface with no protruding screw heads.

Armstrong recommends replacing foil mounting screws annually, as repeated loading cycles gradually reduce fastener strength. Keeping a spare set on hand is a common practice among regular foilers who want to swap hardware at the start of each season without waiting on shipping.

Within Armstrong's hardware catalog, this set sits alongside the M6 Generic Titanium T Nut Set with Dome Head screws, which is the same kit but with a rounded screw cap instead of a flush countersink. Armstrong also sells the A+ System Hardware Set, a more comprehensive kit at a lower price point that includes countersunk and dome screws, barrel nuts, polycarbonate shims, and Torx tools — but that set is designed specifically for A+ Carbon and Performance Carbon masts rather than generic foil tracks.

For riders shopping across brands, comparable titanium or stainless T-nut sets are available from Axis, Takuma, and other foil manufacturers, though thread pitch, T-nut profile, and track width can vary. Confirming compatibility with your specific board's track dimensions before purchasing is important, as not all M6 T-nuts share the same sliding-block geometry.