Stainless Steel Bolts vs Galvanised Steel Bolts: Which One Actually Earns Its Keep?

Stainless and galvanised bolts both have their place — but using the wrong one in the wrong environment can cost you down the track. We break down the real differences in corrosion resistance, strength, and where each one actually belongs, from coastal balustrades to structural steel.

 

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The Advantage of U-Bolts

U-bolts offer renovators a strong, simple way to clamp pipes, rails and rods securely in place. This guide covers sizing, installation, and choosing between square, round, plated and unplated options in stainless steel and high-tensile grades.

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What Does 12.9 Mean on a Bolt? Grade 12.9 Explained

That number stamped on your bolt isn't random — it tells you everything about how strong it is and what it's made of. Here's what 12.9 really means, and why it matters.

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What is 12.9 Grade Steel?

12.9 grade steel bolts are among the strongest commercially available fasteners. Here's what the numbers mean, how they're made, and where they belong — and where they don't.

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12.9 Grade Steel vs Stainless Steel

Not all fasteners are interchangeable. This article compares 12.9 grade high-tensile steel and stainless steel fasteners — examining tensile strength, corrosion resistance, coating options, and the practical risks of substituting one for the other in structural and load-bearing applications.

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Course and Fine Threads

Not all threads are equal — and choosing between coarse and fine can make a real difference to the performance and longevity of your fastened connection. Here's what you need to know.

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SS316 in the Garage: When Marine Grade Fasteners Make Sense for Your 4WD

Let’s talk about where marine-grade fasteners belong *off* the water — right in your garage, and more importantly, all over your rig.

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Restoring a Classic Car? Don’t Use 2020’s Fasteners on a 1960s Chassis

If you're tackling a restoration — whether it’s a Holden Monaro, a Mini Cooper, or a crusty old FJ that’s seen better decades — here’s why you need to match your fasteners to the era.

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The Science Behind Tightness: How Tight is Alright?

Ever wondered why one bolt holds steady for decades, while another loosens faster than a bloke’s grip on Dry July? It’s not magic — it’s science.

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Are Grade 12.9 Bolts Overkill for Your Project?

At Bolt-In Co Sunshine Coast, we stock all kinds of fasteners — from the humble coach screw to the kind of bolt you’d use to keep a tank’s wheels on. Somewhere near the top of the strength food chain? That’d be your Grade 12.9 steel bolts.

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