M6 Grade 5 Titanium Headset Top Cap Fixing Bolts | S-PARTS

Upgrade your bike with lightweight, precision-machined M6 titanium headset top cap fixing bolts from S-PARTS.

This collection includes five different designs: Classic Cylindrical Head, Standard Solid Countersunk, Hollow Small-Diameter Countersunk, Hollow Standard-Diameter Countersunk, and SL Ultra-Light Countersunk.

With multiple lengths from 22 mm to 35 mm, different head diameters, solid and hollow constructions, and weights starting from just 2.07 g per piece, you can select the version that best matches your existing headset top cap and bolt requirements.

This listing is for the titanium fixing bolt only. Headset top caps and other components are not included.

Key Specifications

• Material: Ti-6Al-4V Titanium Alloy (Grade 5)
• Thread Size: M6
• Available Lengths: 22 / 25 / 30 / 35
• Head Styles: Cylindrical Head / Solid Countersunk / Hollow Countersunk / SL Ultra-Light Countersunk
• Head Diameters: Ø10 mm / Ø12 mm
• Construction: Solid / Hollow / Ultra-Light
• Weight Range: Approx. 2.07–5.30 g per piece
• Tool Interface: 4 mm Hex* / 5 mm Hex / T25 Torx / T30 Torx
• Package Includes: 1 × Titanium Fixing Bolt

*The Hollow Small-Diameter Countersunk version is listed as using a 4 mm Hex key based on the current product specifications. Please verify the final tool size against the production version before publishing.

Variant Specifications & Compatibility

Compatibility Reminder: Please check your original bolt length, head style and head diameter before ordering. Different headset top caps require different bolt dimensions.

Bolt Length Measurement

Different bolt head designs use different length measurement methods. Please measure your original bolt carefully before selecting a replacement.

Classic Cylindrical Head

For the Classic Cylindrical Head version, the stated length refers to the length of the bolt shank only.

The height of the bolt head is not included in the stated length.

All Countersunk Versions

For the Standard Solid Countersunk, Hollow Small-Diameter Countersunk, Hollow Standard-Diameter Countersunk, and SL Ultra-Light Countersunk versions, the stated length refers to the overall length of the bolt.

The measurement is taken from the top of the countersunk head to the end of the bolt, meaning the head is included in the stated length.

Grade 5 Titanium Construction

All S-PARTS headset top cap fixing bolts are made from Ti-6Al-4V titanium alloy, commonly known as Grade 5 titanium.

This material offers an excellent balance of:

• Lightweight performance
• High strength
• Corrosion resistance
• Fatigue resistance

The Classic Cylindrical Head versions use a solid, non-hollow construction and are designed for applications where strength is a priority.

The hollow and SL designs focus on reducing unnecessary weight, offering lightweight options for riders who pay close attention to every gram.

Available Colors

Choose from 9 finishes:

• Gold
• Rainbow
• Titanium
• Black
• Blue
• Green
• Purple
• Candy
• Indigo

PVD Vacuum Coating

The Gold, Rainbow, Black and Blue finishes use a PVD vacuum coating process.

A dense surface coating is formed on the titanium, helping improve surface hardness and resistance to everyday wear and impact while creating a rich metallic appearance.

The finish is integrated with the surface rather than applied as conventional paint, helping maintain its appearance under normal riding conditions.

Electrochemical Titanium Anodizing

The Green, Purple, Candy and Indigo finishes are produced through an electrochemical anodizing process.

During anodizing, a controlled oxide layer forms on the titanium surface. Different oxide-layer thicknesses interact with incident and reflected light, creating optical interference that produces different visible colors.

No conventional dyes or pigments are used to create these finishes.

The result is the distinctive metallic color effect unique to anodized titanium.

Candy Finish Variation

The Candy finish features naturally flowing and variable color transitions.

Because the color is created through oxide-layer thickness and optical interference, rather than conventional paint or dye, the exact color distribution may vary from one bolt to another.

Each piece may therefore have its own unique color pattern.

This natural variation is a normal characteristic of the Candy finish.

Light or White Marks on the Threads

Some colored bolts may show small light-colored or white marks around the threaded area.

These are normal electrical contact marks created during the coloring process. During electrochemical surface treatment, the bolt must make electrical contact with the fixture, and these contact points may not receive the same surface finish as the surrounding area.

These marks are not cracks, corrosion, or material damage and do not affect normal use.

Important Notes

• This listing includes 1 × titanium fixing bolt only.
• Please confirm the M6 thread size, required bolt length, head style and head diameter before ordering.
• Remember that Classic Cylindrical Head bolts and countersunk bolts are measured differently.
• The stated length of the Classic Cylindrical Head version does not include the head height.
• The stated length of all countersunk versions includes the head and represents the overall bolt length.
• Check compatibility with your existing headset top cap before installation.
• Candy finishes feature naturally variable color transitions.
• Small light or white marks around the threaded area are normal electrical contact marks created during the surface coloring process.
• Product colors may vary slightly depending on lighting and display settings.