Metric - Nylon Insert locknut

Nylon insert nuts are hex nuts with a built in nylon ring to resist loosening and vibration. These are commonly known as Nylock nuts. When a threaded fastener reaches the collar, the threads and nylon form a tight, compressive force. 

These are standard DIN 985 nuts and available in Black Oxide or Zinc coated steel, Stainless and Marine Grade (316) Stainless Steel options.