M8x20 TX40 Screws – xSurf

Set your foil with confidence. Our M8x20 TX40 screws deliver clean torque, smooth threads, and reliable clamping in salt water.
As a result, thin-pad and compact plate setups lock down fast and stay put.

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 use.
• Precision threads: Easy starts by hand and even clamping under load.
• Short length: 20 mm suits low stack heights and thin pad builds.

Specs

• Thread: M8 × 1.25 (ISO metric).
• Length: 20 mm (under head to tip).
• Head/Drive: TX40 Torx.
• Material: Stainless steel.
• Use cases: Wing/kite/surf foil mast plates, track mounts, hardware refresh.

Compatibility

These M8x20 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. Need more length? Choose
M8x25 or M8x70.

How to Choose Length

• M8x20: Thin pads, minimal shims, shallow plates.
• M8x25: Standard pads and everyday stacks.
• M8x70: Thick pads, risers, or multiple washers.

Always confirm that the screw tip does not bottom out in the nut or track.

Install Guide

1. Seat the mast plate over aligned track nuts.
2. Thread each screw by hand to avoid cross-threading.
3. Tighten evenly until snug, 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 deck pad for repeatable setups.
• For earlier lift, slide the plate 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 20 mm bolts long enough?

Measure your stack height (plate + pad + washers). If in doubt, step up to M8x25.

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

Ready to ride? Choose xSurf M8x20 TX40 screws for clean torque, secure clamping, and compact, reliable setups.