Round Aluminum Sheet Disc Plate Diameter 105mm Thick 6mm 5pcs

The discs are cut to 105 mm diameter and 6 mm thickness. Typical cutting tolerances for aluminum disc blanks of this type are ±0.5 mm on diameter and ±0.2 mm on thickness. If your application requires tighter tolerances, plan to face or turn the blank to final dimension on a lathe.

Please refer to the variant options or contact us to confirm the exact alloy grade. Both 1000-series (commercially pure, excellent corrosion resistance, softer) and 6000-series (alloyed, stronger, still very machinable) are common for disc blanks of this size. We will confirm the specific grade on request.

Yes. At 6 mm thickness you can drill through-holes and tap threads for M3, M4, or M5 fasteners with standard HSS taps. Use cutting fluid and a slow feed rate to get clean threads. For M6 or larger, through-hole tapping is possible but leaves limited thread engagement — consider a blind hole or a thicker disc if high pull-out strength is needed.

Aluminum naturally forms a thin, stable oxide layer that resists rust and general atmospheric corrosion. These discs are suitable for humid workshop environments and light outdoor use. For prolonged outdoor exposure or contact with salt water, applying an anodized or powder-coated finish will significantly extend service life.

Yes. The 105 mm diameter is close to a standard 4-inch driver cutout size, making these discs a practical starting point for speaker spacer rings, baffle adapters, or custom mounting plates. You will need to drill the center hole and any mounting holes to your specific driver dimensions.

Choose 6 mm when you need structural rigidity — for example, a load-bearing bracket, a thick end cap, or a blank that will be turned down on a lathe to a precise finished thickness. If you only need a lightweight cover plate, decorative medallion, or shim, a thinner disc (0.5–2 mm) will be lighter and easier to cut with hand tools. Match the thickness to the mechanical demands of your application.

Yes. The mill-finish surface accepts both DIY anodizing (using a sulfuric acid bath and DC power supply) and rattle-can or brush-applied aluminum primer plus topcoat. Clean the surface thoroughly with acetone or isopropyl alcohol before any finishing process to remove oils and ensure adhesion.