RS PRO Black Multiple Lobes Clamping Knob with M8 Threaded Stud, 44 mm Diameter, 30 mm Stud, Steel Insert 686-121

RS PRO 686-121 Multiple Lobes Clamping Knob is engineered for precision and reliability in industrial environments requiring secure manual fastening. This knob combines an ergonomic multiple lobes design with an M8 threaded stud, enabling users to apply enhanced torque and achieve consistent clamping in diverse mechanical and hardware applications.

The knob features a robust phenolic body that resists mechanical impact, complemented by a zinc-plated steel insert for optimal thread durability and wear resistance. The 44 mm diameter ensures a comfortable grip, facilitating easy adjustment and secure tightening by hand. The 30 mm length M8 steel stud supports compatibility with common hardware and mounting standards.

The matte black finish delivers a clean, professional appearance suitable for machinery, equipment, and furniture in manufacturing, construction, laboratory, and commercial installations. Its design emphasizes both ergonomics and aesthetics, making it appealing for repeated manual operations.

With a working temperature range from -30°C to +85°C, the knob is suitable for environments subject to thermal fluctuations or moderate chemical exposure. Its tolerance to weak acids and excellent resistance to chlorinated hydrocarbons further extend its usability in demanding conditions.

Typical applications include fastening access doors, securing drawers and panels (both domestic and industrial), clamps and fixtures, and assembly in machinery. The product meets the BS771 industry standard for handwheel knobs, ensuring quality and consistency in performance.

The RS PRO clamping knob is frequently used in industrial, laboratory, manufacturing, and construction sectors where frequent manual adjustments and reliable performance are required. Its robust construction supports long-term operation without thread damage or wear, making it an ideal choice for mechanical assemblies, equipment enclosures, and fixtures.

Browse more Clamping Knobs and RS PRO branded industrial hardware on EnvMart for technical solutions and quality components suitable for a wide range of applications.