M6 Knurled Thumb Screws PC Case Thumbscrew Flat Knob Bolt - Al Alloy Multicolor

Most ATX and mATX side panels use M6 thumbscrews with a 10–15 mm shaft length. If your panel is thin sheet metal (typically 0.8–1.2 mm), the M6 x 10 mm variants (D10 x H5 or D14 x H5) are the most common fit. For thicker panels or stacked materials, the 15 mm or 20 mm shaft gives more thread engagement. Measure your panel thickness and standoff depth before selecting.

Yes — M6 is a standard thread size used in many 3030 and larger extrusion profiles with M6 T-nuts. For 2020 profiles, M5 is more common, so verify your extrusion's T-nut thread before ordering M6. These screws work well for panel attachment, end caps, and access covers on M6-threaded extrusion assemblies.

The D10 x H5 head has a 10 mm diameter knob — more compact and suited for tighter panel layouts where adjacent components are close. The D14 x H5 head has a 14 mm diameter, offering a larger grip surface for easier finger-tightening. Both are the same H5 mm height (flat profile). The D12 x H10 variant (M6 x 30 mm size) has a taller knob for deeper grip when longer shaft engagement is needed.

The anodized finish is integrated into the aluminum surface rather than painted on, so it resists chipping and peeling under normal handling. It is not rated for harsh chemical exposure or abrasive environments. For builds that are opened and closed regularly, the finish holds up well under typical finger-tightening torque. Avoid using tools on the knob, as over-torquing can mar the surface.

The stainless steel threaded shaft provides corrosion resistance suitable for moderate humidity. The aluminum alloy knob with anodized finish also resists surface oxidation. These are not rated for submersion or prolonged salt-spray exposure. For outdoor enclosures in wet climates, consider applying a thread sealant and inspect periodically for any surface wear.

A standard ATX case typically uses 2–4 thumbscrews per side panel, so a 5-piece pack covers one build with a spare. The 10-piece pack suits dual-panel builds or two separate cases. The 50-piece pack is suited for workshop restocking, small-batch production, or teams building multiple rigs. Bulk packs offer a lower per-unit cost and reduce reorder frequency.

The knurled surface is machined into the aluminum knob and does not wear smooth under normal use. Thread retention depends on the receiving nut or standoff condition — if the mating thread is worn or cross-threaded, the screw may feel loose regardless of the knob grip. For best results, ensure the receiving thread is clean and undamaged before installation.