Qualfast: M5 Locknut N/M Insert A2 Metal Form Manufactured from stainless steel to prevent rusting. MPN: M5 Locknut N/M Insert A2 Metal Form Attributes: Box Quantity: 100 Driving Features: Hexagon Grade: 316 Leading Standard: DIN 985 (1987) Material: A2 Stainless A2 Stainless Nut Type: Nylon Insert Surface Treatment: Metalform Thread: Metric Thread Direction: Right Thread Size: M5