Bolts - Standard Alloy
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These work with standard climbing wall t-nuts.
Great for indoor use, though if you are in a wet environment or have an outdoor wall we recommend Stainless Steel Bolts and Stainless Steel T-Nuts instead.
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Other Styles of Bolt: If your holds are tiny footholds with the washer close to the surface you'll need Buttonhead Bolts, or if they have no washer and instead have a countersunk attachment point (looks like a martini glass would fit in it) then the bolts have a flat top and are called Martini Bolts / Flatheads and we have those as well.
Standard vs Metric: Standard 3/8" bolts are what we use in the US, Metric M10 bolts and t-nuts are used in the UK and Europe. M10 is slightly larger than 3/8". 3/8" bolts will actually work in M10 t-nuts, but because the Standard 3/8" bolt shaft is a little smaller than a Metric M10 bolt shaft, a Standard bolt in a Metric t-nut is a bit more likely to strip out the threads. Metric M10 bolts DO NOT fit in Standard T-Nuts, or sometimes you can get them in but they'll usually get stuck. It's always recommended to make sure you have the correct hardware that fits together correctly.