M6 x 1.00 Coarse Thread DIN 985 Class 10 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Zinc Plated Pk 100: Amazon.com: Industrial & Scientific
Carbon Steel Lock Nut, Zinc Plated Finish, Right Hand Threads, Self-Locking/Nylon Insert, Meets DIN 985, M6-1.0 Threads (Pack of 100): Hardware Locknuts: Amazon.com: Industrial & Scientific
MonsterBolts - M6 Nylon Insert Lock Nuts, DIN 985, Alloy Steel, Black Oxide, 10 Pack: Amazon.com: Industrial & Scientific
M6 x 1.00 Coarse Thread DIN 985 Class 8 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Black Oxide Pk 1500: Amazon.com: Industrial & Scientific
S.3589 Self Locking Nut, Size: M6 x 1.00mm (Din 985) Metric Coarse: Amazon.com: Industrial & Scientific