M8 x 1.25 Coarse Thread DIN 985 Class 8 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Black Oxide Pk 25: Amazon.com: Industrial & Scientific
Amazon.com: M8-1.25 Din 985 Metric Nylon Insert Hex Locknut 18 8 Stainless Steel (Pack Qty 1,500) BC-M8D985188 by Shorpioen
MonsterBolts - M8 Nylon Insert Lock Nuts, DIN 985, Alloy Steel, Black Oxide, 25 Pack