Tube-Town Store - Spacer Bolt M4 / 20 mm, inner thread
EJOT® spacer bolt – without pre-drilling | EJOT COM
PATIKIL M10 Aluminum Spacers,5Pcs Metal Spacer Aluminum Round 10.5mm ID x 20mm OD x 15mm L Thickness Aluminum Spacer Screw Standoff for 3/8" M10 Screw Bolt : Amazon.co.uk: DIY & Tools