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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
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.
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