Screw with hexagonal head

self-locking

The NYLOK BLUE PATCH™ self-locking element is permanently spray bonded onto the threads of a fastener. When mating threads are engaged, the tough, resilient blue nylon patch element is compressed and a counterforce is created to establish a much stronger metal-to-metal contact and positive resistance to vibration and loosening. A NYLOK BLUE PATCH (known as TUF-LOK® in Europe) self-locking patch can be applied to your own fasteners, or ready-to-install self-locking fasteners can be supplied to meet your specifications. Screws as small as #00-90 (M1.0) can be processed and NYLOK BLUE PATCH self-locking elements can be applied with equal effectiveness to large diameter fasteners. Advantages * Exceptional vibration resistance * Reusable * Adjustable * Seals * Applicable to any head configuration * 180° (std) or 360° (optional) radial coverage * Wide variety of patch locations and coverage * Easy to use in assembly * Non-toxic, assembler friendly * Environmentally friendly * Torque values can be customized to meet your requirements * Applicable to a variety of materials and finishes * Compatible with different mating part materials * Resistant to lubricants, fuel, hydraulic fluids and most commercial solvents * Durable * Cost effective * No metal removal to reduce fastener strength or performance * Temperature range: -70°F to 250°F (-56°C to 121°C)