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.

If you’ve spent more than ten minutes near saltwater with a tackle box in hand, you already know this: the ocean is not kind to anything made of inferior metal.

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.

If you’ve ever snapped a cheap bolt in half and stared at it in frustration, wondering why it failed, chances are you weren’t using 12.9 grade steel. Learn more about Grade 12.9 fasteners in this article.