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Titanium Fasteners Sizes Guide: M3 to M30 Explained

Learn titanium fastener sizes from M3 to M30, including applications, selection guide, and how to choose the right bolt size for engineering projects.

mia Chang

6/21/20262 min read

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Titanium Fasteners Sizes Guide: M3 to M30 Explained (2026)

Introduction

Titanium fasteners are available in a wide range of sizes to meet different industrial and engineering requirements.

From small precision components to large structural assemblies, selecting the correct size is critical for safety and performance.

This guide explains common titanium fastener sizes from M3 to M30 and their applications.

1. What Do M Sizes Mean?

The “M” in fastener sizes refers to metric thread diameter.

For example:

  • M3 = 3mm diameter

  • M4 = 4mm diameter

  • M5 = 5mm diameter

  • M10 = 10mm diameter

👉 Larger number means larger bolt diameter and higher load capacity.

2. Small Titanium Fasteners (M3 – M5)

These are used for precision and lightweight applications.

Applications:

  • Electronics

  • Small mechanical devices

  • Motorcycle fairings

  • CNC precision parts

Features:

  • Lightweight

  • High precision

  • Easy installation

3. Medium Titanium Fasteners (M6 – M10)

Most commonly used size range in industrial applications.

Applications:

  • Motorcycle engines

  • Automotive parts

  • Machinery assemblies

  • Structural components

Features:

  • Balanced strength

  • High reliability

  • Wide availability

👉 This is the most popular size range for Grade 5 titanium bolts.

4. Large Titanium Fasteners (M12 – M30)

Used for heavy-duty industrial and structural applications.

Applications:

  • Aerospace structures

  • Heavy machinery

  • Marine equipment

  • Engineering infrastructure

Features:

  • High load capacity

  • Strong structural performance

  • Requires precise torque control

5. Choosing the Right Size

When selecting titanium fasteners, consider:

✔ Load requirements
✔ Application environment
✔ Material grade
✔ Thread type
✔ Assembly space

👉 Incorrect sizing can lead to mechanical failure.

6. Common Titanium Fastener Sizes in Industry

Most commonly used sizes include:

  • M3

  • M4

  • M5

  • M6

  • M8

  • M10

  • M12

👉 M5 and M6 are the most widely used in motorcycle and CNC applications.

7. Grade Selection for Different Sizes

Grade 5 Titanium Fasteners

  • Used in most M4–M20 applications

  • High strength

  • Best for aerospace and automotive

Grade 2 Titanium Fasteners

  • Used in corrosion-resistant environments

  • Chemical and marine applications

  • Lower mechanical load

8. Applications by Size

Small Sizes (M3–M5)

  • Electronics

  • Lightweight assemblies

  • Racing motorcycles

Medium Sizes (M6–M10)

  • Automotive engines

  • Industrial machinery

  • CNC parts

Large Sizes (M12–M30)

  • Aerospace structures

  • Marine engineering

  • Heavy equipment

Why Titanium Fasteners Are Better Than Steel Sizes

✔ Lighter weight at same size
✔ Higher corrosion resistance
✔ Longer lifespan
✔ Better fatigue performance

Why Choose RuiPros Titanium Fasteners Supplier

RuiPros supplies:

  • M3–M30 Titanium Bolts

  • Titanium Screws

  • Titanium Nuts

  • Titanium Washers

  • Grade 5 Titanium Fasteners

  • Custom CNC Titanium Parts

Advantages:

✔ Factory direct pricing
✔ Stable quality control
✔ OEM customization
✔ Global export experience
✔ Fast delivery capability

FAQ

What sizes do titanium bolts come in?

They range from M3 to M30 depending on application.

What is the most common titanium bolt size?

M5 and M6 are the most commonly used sizes.

Are larger titanium bolts stronger?

Yes, larger diameter increases load capacity.

Can titanium fasteners be custom sized?

Yes, OEM and custom CNC sizes are available.

Get In Touch

For inquiries regarding our products or to request a detailed price list, please contact us. We guarantee a response within 24 business hours.

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