Bolt - Steel

Reliable Steel Fasteners for Every T-Slot Aluminium Project

When it comes to building strong, secure, and modular aluminium framing systems, the quality of your fasteners matters as much as the profiles themselves. At 8020 Australia, we stock a solid range of steel bolts — including M6 bolts and M8 bolts — built specifically for T-slot aluminium extrusion systems. Whether you’re bolting together a machine frame, a workshop bench, or a retail display, these are the fasteners that hold it all together.

Whether you’re working on a home workshop fit-out, an industrial machine frame, or a retail display structure, our steel bolts give you reliable performance without overcomplicating the build.

Steel Bolts – Strong, Reliable Connections

Steel Bolts for Framing Projects

These are the workhorses of any T-slot build. Made from strong steel with a zinc coating for rust resistance, they deliver secure, consistent fastening across structural aluminium frames of all sizes. The range covers M4, M5, M6, and M8 sizing — so whether you’re speccing out a lightweight display frame or a heavy industrial structure, there’s a bolt in here that fits.

Button Head Bolts

When a clean finish matters, button head bolts are worth considering. The smooth, domed cap sits low on the surface and complements modern T-slot designs without getting in the way. M6 bolts and M8 bolts in button head style are both available, covering the most common sizing used in aluminium extrusion builds.

• M6 Button Head Bolt, Steel: A versatile mid-range bolt suited to most framing and panel connections.
• M8 Button Head Bolt, Steel: Handles heavier loads while maintaining a tidy profile.
• M4 Button Head Bolt, Steel: Compact and precise for smaller assemblies or lighter components.

Countersunk Steel Bolts

For applications where flush mounting is important — think panel joins, machine guards, or anywhere a protruding bolt head would cause interference — countersunk steel bolts are the right call. They sit flush with the surface and keep everything looking clean and intentional. Available in M6 and M8 sizing.

Why Choose 8020 Australia for Your Fasteners?

We take pride in stocking components that actually do what they’re supposed to — hold firm, fit right, and last. Every steel bolt in this range is selected for quality and compatibility with 8020 aluminium extrusion profiles.

That’s why we only stock bolts that are tested for quality, durability, and performance.

• Strong steel construction
• Corrosion-resistant finish
• Perfect fit with aluminium t slot extrusion
• Ready to ship Australia-wide
• Great value in small or bulk quantities

Orders ship Australia-wide, and whether you’re buying a handful of M6 bolts for a small project or stocking up on M8 bolts for a larger build, we’ve got you covered on price and availability. No minimum orders, no fuss.

How to Choose the Right Fastener

1. Assess the Load Requirements

Heavy frameworks like workbenches or robots demand steel M8 bolts. Lighter structures or display units may only need M4 button head screws.

2. Factor in Environment

Steel bolts with a zinc coating handle most indoor environments well. But for outdoor installations, food production areas, or anywhere with regular moisture exposure, stainless steel hardware is the more reliable choice. Stainless steel fasteners — including stainless steel bolts and stainless bolts in various metric sizes — resist corrosion far better over the long term. If that’s what your project needs, browse our Bolt – Stainless Steel range for the full selection of stainless steel bolts compatible with 8020 profiles.

3.Consider Aesthetics

If you want a minimal, tidy appearance, go for countersunk bolts. Button head bolts offer a more decorative alternative without sacrificing strength.

Simple Installation Steps

• Slide a T-slot nut into the extrusion groove at the desired position.
• Align your bracket, panel, or connector.
• Insert the steel or stainless bolt through the component and into the nut.

Tighten to secure. Adjustability remains effortless—loosen, slide, and retighten as needed.

Need Help Choosing the Right Bolt?

Not sure which fastener suits your build? Our expert team is here to help you match the right bolt to your aluminium profile, load requirements, and design needs. We’ll make sure you get everything you need for a smooth, successful build—start to finish.

Shop Fasteners Online in Australia

Browse the full range of steel bolts above — M4, M5, M6, and M8 sizing across button head, socket head, and countersunk styles. If you’re not sure which bolt works with your profile or T-nut combination, get in touch and we’ll point you in the right direction. Fast shipping Australia-wide, competitive pricing, and the full 8020 ecosystem behind every order.

Build smarter. Build stronger. Build with 8020.