A2 Stainless Steel T-Slot Bolts | M5 M6 M8 M10 M12 | 12mm–70mm | T-Track Bolts

Measure the total material thickness you need to clamp, then add the depth of the T-slot channel (typically 5–8mm). The bolt shank should extend at least 1.5× the thread diameter beyond the nut for a secure grip. For example, a 20mm (≈13/16") bolt is generally suitable for clamping workpieces up to about 12mm thick in a standard T-track. When in doubt, go slightly longer — you can always use a washer to take up extra thread.

These bolts use standard ISO metric coarse threads (DIN 787 / DIN 508 profile). M5, M6, M8, M10, and M12 are the most common sizes for aluminum T-slot extrusions and woodworking T-tracks worldwide. They are compatible with standard metric T-nuts, drop-in nuts, and roll-in nuts of the corresponding size.

Yes. A2 stainless steel (also known as 304 stainless steel) offers good corrosion resistance and is generally suitable for outdoor, damp, and mildly corrosive environments. For highly aggressive marine or chemical environments, A4 (316) stainless steel is typically recommended. In normal workshop and light outdoor use, these bolts will generally maintain their appearance and strength without rusting.

A2 stainless steel T-slot bolts typically have a tensile strength of around 500–700 MPa depending on the diameter. Actual clamping load capacity depends on the T-slot profile, nut engagement length, and your specific application. For structural or safety-critical applications, please consult a qualified engineer and verify with your extrusion manufacturer's specifications.

These bolts are designed to fit standard metric T-slot aluminum extrusions — including 20-series (20×20, 20×40), 30-series, and 40-series profiles — as well as most woodworking T-track systems that accept the corresponding bolt head width. Always verify the T-slot opening width against the bolt head dimensions for your selected size before ordering. If you're unsure, contact us with your extrusion model number.

Match the bolt diameter to your T-slot channel size and load requirements. M5 and M6 are typically used with 20-series and 30-series aluminum extrusions or light-duty T-tracks. M8 is common for 40-series profiles and medium-duty fixtures. M10 and M12 are generally used for heavy-duty clamping, machine tables, and structural assemblies. Check your extrusion or T-track manufacturer's specifications to confirm the recommended bolt size.

Yes. These T-slot bolts are designed to work with standard T-nuts, drop-in nuts, and roll-in nuts that match the corresponding metric thread size. Ensure the nut profile matches your extrusion's T-slot groove dimensions for a secure fit. If you need matching T-nuts, check our store for compatible accessories.