T-Slot Bolts T-Head Track Bolts – A2 304 Stainless Steel, M5 M6 M8 M10, 12mm–60mm

Measure the total thickness of the material you are clamping, then add the depth of the T-slot channel (typically 6–10 mm). Choose a bolt length that gives at least 3–5 full thread engagements into your nut or bracket. For example, clamping 10 mm (≈3/8") of material in a standard 20-series slot generally calls for an M5 x 20 or M5 x 25 bolt. When in doubt, size up — a slightly longer bolt with a washer is easier to work with than one that's too short.

A2 304 stainless steel bolts typically have a tensile strength of around 500–700 MPa, which is generally sufficient for machine frames, fixtures, and enclosures. For structural or high-load applications, consult the torque specifications for your specific size and always verify with a qualified engineer if safety-critical loads are involved. Do not exceed the rated torque for the bolt diameter.

Yes. A2 304 stainless steel offers good corrosion resistance and is generally suitable for outdoor, humid, and mildly corrosive environments — including workshops with coolant mist or outdoor equipment enclosures. For marine environments or applications with prolonged exposure to saltwater or chlorides, A4 316 stainless steel is generally the better choice.

These bolts use standard ISO metric coarse threads: M5 at 0.8 mm pitch, M6 at 1.0 mm pitch, M8 at 1.25 mm pitch, and M10 at 1.5 mm pitch. They are compatible with standard metric T-nuts, drop-in nuts, and slide-in nuts used in 20, 30, and 40 series aluminum extrusion systems from most major manufacturers.

These T-head bolts are designed to fit standard T-slot aluminum extrusion profiles, including commonly used 20-series (20×20, 20×40), 30-series, and 40-series profiles. M5 bolts typically fit 6 mm wide slots, M6 bolts fit 8 mm slots, and M8/M10 bolts fit larger slot widths. Always verify the slot width and T-nut specification of your specific extrusion before ordering to ensure a proper fit.

The 1-pack is ideal for repairs, replacements, or testing fit before committing to a larger order. The 4-pack suits small bracket assemblies or single-axis linear rail mounts. The 10-pack offers the best per-bolt value and is recommended for building full extrusion frames, CNC router tables, workstation fixtures, or any project requiring multiple connection points across the structure.

The T-shaped head slides into the open end of the T-slot channel or drops into the slot through the access gap (depending on your extrusion profile). Once positioned, rotating the bolt 90° locks the head against the slot walls. Tighten with a standard hex key or wrench on the threaded end. No special tools are required beyond what you'd use for any metric bolt.