Countersunk Screw M3*8(10-Pack)

Makeblock copper washer (4* 10 * 1mm) has an inner diameter of 4mm, outer diameter of 10mm, and a thickness of 1mm. The copper washer is made of brass material and features high precision, smoothness, good wear resistance, and rust resistance. It can be used in all DIY projects. In Makeblock plastic timing pulley 62T, plastic timing pulley 90T, plastic timing pulley 62T without steps, and plastic timing pulley 90T without steps, the Makeblock copper washer can be used as a high-precision moving part to ensure stable motion of the above items. Also, it can be used together with the flange copper sleeve (4 * 8 * 3mm). Features: perfect for adding to timing pulley and shaft D4mm; ensure stable motion of the moving parts and meet high precision requirements; made of brass; diameters: 4mm (inside), 10mm (outside); sold in a pack of 10.