2pcs Thumb Screw Knobs M5 M6 M8 x 6mm-100mm T- Screws With Tee Wing Knob Head

Measure the total grip depth — the combined thickness of all panels and any spacers the screw must pass through — then add 2–3 mm for thread engagement beyond the last panel. For example, a 3 mm panel with a 4 mm standoff typically needs a shank of at least 9–10 mm. When in doubt, size up one increment; excess thread can be managed with a washer or nut.

These screws follow standard ISO metric coarse pitch: M5 × 0.8 mm, M6 × 1.0 mm, and M8 × 1.25 mm are the most common coarse-pitch values for these diameters. If your application requires fine pitch, contact us to confirm before ordering.

The Silver finish variants are typically zinc-plated or stainless-finished, offering moderate corrosion resistance suitable for indoor enclosures and electronics builds. The colored variants (Black, Burgundy, Royal Blue) use an anodized or coated finish. For outdoor or high-humidity environments, contact us to confirm the specific finish on your chosen variant.

Most ATX and mATX PC cases use M3 or M6 thumbscrew threads for side panels and expansion slot covers. The M6 variants in this listing are compatible with M6-threaded panel holes. Verify your case's thread spec before ordering — M5 and M8 variants are better suited for custom enclosures, extrusion frames, and industrial panels.

Yes. M5 and M6 are the two most common thread sizes used with T-slot aluminum extrusion profiles (2020, 3030, 4040 series). Select the M5 or M6 variant matching your extrusion's T-nut thread, and choose a shank length that clears the extrusion wall thickness — typically 10–20 mm for standard profiles.

The tee wing profile allows comfortable finger torque sufficient for panel retention and light structural fastening — typically adequate for applications where screws are tightened to snug rather than torque-spec. These are not intended as structural load-bearing fasteners in high-vibration environments. For vibration-prone assemblies, consider adding a nylon-insert nut or thread-locking compound on the mating side.

No. Color is a surface finish only and does not alter thread diameter, pitch, shank length, or base material. All four color options (Silver, Black, Burgundy, Royal Blue) are available across the same size range and are dimensionally interchangeable.