Lock screws DIN 603 stainless steel VA FLAT HEAD SCREWS M5 M6 M8 Niro | eBay
Four engine hi-res stock photography and images - Page 3 - Alamy
I emailed MrMetric asking them to stock those thin (DIN562; 1.8mm thick) square nuts used in loads of 3D printer parts and they came through! If you're in the US this is
Antibiotics | Free Full-Text | Activity of N-Chlorotaurine against Long-Term Biofilms of Bacteria and Yeasts