Dome Head Square Shank Bolts M8 x 20mm for Slotted Angle

Box of 100

These M8 x 20mm Dome Head Square Shank Bolts are designed specifically for use with slotted angle systems, making them ideal for assembling garage door frameworks, shelving, brackets and general fabrication projects.

The square shank locks securely into the slotted angle channel, preventing the bolt from spinning during tightening. This makes installation faster, easier and far more reliable—perfect for both trade users and DIY customers looking for a secure fixing solution.

Supplied in a box of 100, these bolts offer great value for installers working on larger builds or carrying out repeat repair work.

Key Features

• Size: M8 x 20mm
• Head Type: Dome head
• Shank: Square, anti‑rotation design
• Application: Ideal for slotted angle systems
• Pack Size: 100 bolts
• Fast, secure assembly suitable for garage door frameworks and general metalwork

Why Choose These Bolts?

Prevents spinning during tightening for easier installation
Ideal for garage door support frames and structural builds
Strong and reliable fixing for both trade and DIY use