M8 x 1.25 Coarse Thread DIN 985 Class 8 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Black Oxide Pk 1000: Amazon.com: Industrial & Scientific
M24 x 3.00 Coarse Thread DIN 985 Class 8 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Zinc Plated Pk 10: Amazon.com: Industrial & Scientific