Amazon.com: uxcell M3 x 40mm Alloy Steel Hex Bolt Socket Head Cap Screws Black 50 Pcs : Industrial & Scientific
Amazon.com: IIVVERR 5.7mm Diameter Hex Head Metal Fastener Screw Threaded Bolt (Tornillo roscado de tornillo de cierre de metal de cabeza hexagonal de 5,7 mm de diámetro : Everything Else
Zeberoxyz 2PCS Set GT2 Synchronous Wheel 20&30 Teeth 5mm Bore Aluminum Timing Pulley with 2PCS Length 200mm Width 6mm Belt (20-30T-5B-6): Amazon.com: Industrial & Scientific
10mm (M10) Nylon Spacers Standoff Washers (10 Pack) 4 x 15mm, 4 x 10mm, 2 x 5mm - Black: Amazon.com: Industrial & Scientific
Amazon.com: uxcell 100Pcs M5 x 1mm Stainless Steel Metric Flat Washer for Bolt Screw : Industrial & Scientific