Amazon.com: M36-4.00 Nylon Insert Locknut DIN 985 / Metric Class 8 Steel/Zinc Plated (Quantity: 25) : 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