PATIKIL M8 Aluminum Spacers,10Pcs Metal Spacer Aluminum Round 8.2mm ID x 16mm OD x 10mm L Thickness Aluminum Spacer Screw Standoff for 5/16" or M8 Screw Bolts : Amazon.co.uk: DIY & Tools
Grivel Rambo Original Spacers and Bolts Kit (95.72) - Needle Sports Ltd