M8x70 TX40 Screws – xSurf

Lock your setup with confidence. Our M8x70 TX40 screws deliver clean torque, smooth threads, and long service life in salt water.
As a result, your mast plate clamps firmly even with thick pads, shims, or washers.

Why These Screws

• TX40 Torx drive: High torque with less cam-out and fewer stripped heads.
• Stainless steel: Corrosion resistance for daily salt and sand exposure.
• Precise machining: Clean threads for smooth starts and even clamping.
• Extra length: 70 mm reaches through thicker pads, risers, and shims.

Specs

• Thread: M8 × 1.25 (ISO metric).
• Length: 70 mm (under head to tip).
• Head/Drive: TX40 Torx.
• Material: Stainless steel.
• Use cases: Wing/kite/surf foil mast plates, deep track mounts, hardware refresh.

Compatibility

These M8x70 TX40 screws fit most foils that use M8 bolts and US box tracks.
They pair perfectly with our M8 Paired Track Nuts and all boards in the
xSurf range. For thinner pads, consider the
M8x25 TX40 screws.

How to Use

1. Place the mast plate over the track slots (paired nuts aligned).
2. Thread each screw by hand first to avoid cross-threading.
3. Tighten evenly in an “X” pattern. Then recheck after your first run.

Pro Tips

• Add stainless washers under the heads for smoother tightening and load spread.
• Mark favorite mast positions on the pad for repeatable setups.
• For earlier lift, slide the plate slightly forward; for more top-end, move it back.

Care

Rinse with fresh water after each session. Next, dry fully before storage.
Finally, apply a tiny drop of light oil to threads if you ride daily.

FAQ

Will these work with my foil brand?

Yes—if your system uses M8 bolts and US box tracks. Most modern foils do.

Do I need threadlocker?

Usually no. Re-check tightness after the first session and after travel.
Use a low-strength threadlocker only if your brand recommends it.

Are 70 mm bolts too long for my setup?

Measure stack height (plate + pads + washers). If needed, add washers or choose a shorter option like M8x25.

Build your kit: see xSurf accessories and pair with
the M8 Paired Track Nuts for fast alignment.
For standards background, read about
ISO metric threads
and the Torx drive.

Ready to ride? Choose xSurf M8x70 TX40 screws for clean torque, secure clamping, and reliable sessions—no matter the stack height.