M4 HEX NUT FULL HEXAGON NUTS DIN 934 STAINLESS STEEL. M2 M2.5 M3 M4 M5 ALLEN KEY GRUB SCREWS CUP POINT SCREWS A2 STAINLESS DIN 916. 5mm HALF LOCK NUTS THIN HEXAGON HALF LOCK NUT A2 STAINLESS STEEL DIN 439.
eBay