Brighton Best's M12 Nylon Insert Thin Hex Lock Nut combines a 12 mm nominal diameter with a 1.75 mm thread pitch and Class 10 mechanical properties for dependable metric fastening. The nylon insert provides a practical locking function without requiring a separate locking washer or adhesive, while the zinc CR+3 finish helps protect the steel nut against corrosion in suitable environments. Its standard hex configuration measures 19 mm across the flats, allowing straightforward installation with the appropriate wrench or socket. The nut is identified with DIN 985 and approximately ISO 10511 specifications, making it a useful choice for equipment assembly, fabrication, mechanical repairs, and other applications requiring a metric lock nut with controlled resistance to loosening.