S-Parts Titanium Universal Titanium Stem Bolts M5 x 18mm Slimline Head
S-Parts Titanium Universal Titanium Stem Bolts M5 x 18mm Slimline Head
S-Parts M5 x 18mm Titanium Stem Bolt
TC4 Grade 5 — T25 Torx — Integrated Washer — Road / Gravel / MTB
If you’re searching for M5 x 18mm titanium stem bolts, this is the premium option.
The S-Parts M5 x 18mm stem bolt is designed to replace stock steel stem hardware with Grade 5 (TC4 / Ti-6Al-4V) titanium, delivering high strength, corrosion resistance, and a clean finish that instantly upgrades the look of any cockpit.
This slightly longer 18mm size is ideal for stems and integrated cockpits that require more thread engagement — and it’s been tested on the Roval cockpit.
Why upgrade your stem bolts?
Stem bolts are small, but they matter.
They’re one of the most visible fasteners on the bike, they see repeated torque cycles, and stock steel bolts are often the first thing to rust, seize, or look tired.
Upgrading to S-Parts titanium gives you:
a cleaner cockpit finish
corrosion resistance for year-round riding
lighter hardware without compromising clamping strength
a premium look that matches high-end builds
Compatibility (Stems)
This bolt has been tested on the Roval cockpit, and is commonly used on stems from major brands including:
✅ Roval
✅ PRO
✅ Bontrager
✅ FSA
✅ DEDA
…and many more.
Always confirm bolt length and thread depth on your specific stem before ordering.
Sold Individually (On Purpose)
We sell these bolts individually, not as a 6-pack.
With more bikes now using integrated cockpits, 2-bolt face plates, and proprietary stems, many riders only need 2 or 4 bolts — not a full set. This lets you replace exactly what you need.
Specs
Thread: M5
Length: 18mm
Material: S-Parts TC4 Grade 5 Titanium (Ti-6Al-4V)
Tool Interface: Torx T25
Head Type: T25 Torx with integrated washer
Finish: PVD or Vacuum Nitrided
Weight: 2.19g per bolt
Key Features
CNC-machined for clean threads and consistent fit
Titanium strength with excellent corrosion resistance
Finish resists wear and keeps the cockpit looking sharp
Ideal for high-end road, gravel, and MTB builds
Perfect for replacing rounded, rusted, or tired stem bolts
Fitment Note (Important)
M5 x 18mm is a common stem bolt size, but hardware varies by brand and model.
If you’re unsure, measure your original bolt length or check your stem manufacturer specs.
We also stock a shorter M5 x 16mm version for stems that require it.
Installation Tip
Use a torque wrench and tighten to your stem manufacturer’s recommended torque setting.
Correct torque = correct clamping force and safe cockpit setup.
Why Choose S-Parts Titanium Bolts & Screws?
Small upgrade. Massive difference.
S-Parts are one of the most respected names in titanium bicycle bolts and screws, producing lightweight bike hardware designed for riders who care about performance and finishing detail. Since 2010, they’ve specialised in precision fixings for road, gravel, mountain and performance builds — helping riders reduce weight, prevent corrosion, and finish a bike properly.
Whether you’re chasing grams or building a clean custom colourway, S-Parts is one of the easiest ways to upgrade the details that most bikes leave behind.
With 1000+ bolt and screw options, S-Parts covers everything from cockpit hardware and bottle cages to drivetrain, brake and suspension fixings.
Why Titanium?
Stock hardware works — until it doesn’t.
Titanium is trusted across cycling because it offers an elite balance of:
low weight
high strength
corrosion resistance
long-term durability
S-Parts components are manufactured from TC4 Grade 5 titanium (Ti-6Al-4V) — an aerospace-grade alloy known for excellent fatigue resistance and strength-to-weight performance.
Many S-Parts titanium bolts and screws offer strength comparable to high tensile steel hardware, while weighing significantly less and staying corrosion-free year-round.
S-Parts Bolt & Screw Colour Options
S-Parts titanium hardware is available in 9 standout colourways:
Blue
Black
Candy
Gold
Green
Indigo
Purple
Rainbow
Titanium
Perfect for matching frames, finishing kits, accent builds and custom upgrades.
How Are S-Parts Bolts & Screws Coloured?
S-Parts uses two proven finishing methods to achieve durable, high-end colourways:
Vacuum Nitriding
Used for:
Black, Blue, Gold, Rainbow
A hard-wearing surface treatment designed for durability and long-term appearance.
Anodising
Used for:
Candy, Green, Indigo, Purple
An electrochemical process that creates vivid colours while maintaining titanium’s natural corrosion resistance.
Measuring Your Bolts & Screws (Important)
Bolt sizing can be confusing — especially when brands measure hardware differently.
For S-Parts products, bolt and screw length refers to the shaft length only:
✅ measured from under the bolt head to the end of the thread.
S-Parts thread sizes range from M3 through to M10, covering the most common bicycle applications.
If you’re unsure what size you need, contact us — we’ll help you match the correct part.
Installation Note
Always follow your component manufacturer’s official installation instructions and torque settings. If in doubt, use a torque wrench and reach out before fitting.
Weights may vary by ±2% due to manufacturing tolerances.
Popular S-Parts upgrades: Titanium stem bolts • Titanium bottle cage bolts • Titanium chainring bolts • Titanium brake caliper bolts