4mm Hex Lock Nut Aluminum, Black Oxide 18-8 Stainless 7mm Hex.
- Nut with a metric thread pitch and a nylon-filled collar at its back end.
- When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when it is subjected to vibration.
- The nylon insert comes in a various of colors.
- 7mm Socket, or wrench needed.
- 10pcs of 4mm hex lock nut, black oxide stainless 18-8.