Flush Mount Bolts — Stem, Hanger, and Titanium Upgrade

Flush mount bolts sit level with the surface — no protruding head, no snag point. On bikes, they appear at stem face plates, derailleur hangers, and some seat clamp collars. Here is what changes when you upgrade each one to titanium.

Stem Face Plate Bolts

Most stems use M5 or M6 flush-head bolts to clamp the face plate over the bar. Steel bolts tend to seize in the stem body — especially aluminum stems after wet-season riding. TiNE M6 stem bolts in Grade 5 Ti-6Al-4V resist seizing far better and weigh roughly 2.0–3.3 g each (depending on length: M6×25, 30, 35, 45) vs ~4–6 g for steel equivalents.

Derailleur Hanger Bolts

The rear derailleur mounts to the frame via a hanger bolted with a flush M5. Steel corrodes at the thread-hanger interface — removal risks stripping or snapping the hanger. TiNE titanium M5 hanger bolt: lighter, resists corrosion far better than steel, and the low-profile head keeps cable routing clear.

Material Comparison

Install Tip

Flush-head bolts need a countersunk seat — check that your stem or hanger has the correct recess. Apply a thin film of grease or anti-seize on titanium threads before installing into aluminum. Tighten evenly on multi-bolt face plates to avoid uneven clamp pressure.

Flush mount titanium bolts at tinetech.com