RS PRO Black Two Part Clamping Knob, M6 Thread, Multiple Lobes, Polypropylene & TPE, Brass Insert 188-3440

The RS PRO 188-3440 Black Clamping Knob is engineered for precision manual fastening and adjustments, featuring a durable two-part moulding construction. The inner moulding is made from high-strength polypropylene, while the overmould consists of a soft-touch styrenic thermoplastic elastomer, ensuring optimal tactile comfort and slip resistance during operation. This knob has a multiple lobe shape designed to provide superior grip and torque, making it ideal for applications where repeated tightening or loosening is required without the need for tools.

With an M6 threaded through-hole, the knob is versatile for mounting onto equipment, panels, or assemblies. The brass female insert delivers reliable mechanical strength and resistance to corrosion, ensuring secure installation even in harsh environments. The 28 mm diameter makes it suitable for convenient adjustment and ergonomic operation.

The knob boasts a tensile strength of 11 MPa and tear strength of 30 kN/m, contributing to its rugged performance in industrial, laboratory, and mechanical contexts. Electrical resistivity of 8 x 1015 ohm.cm and flame retardant properties provide additional protection, making this component suitable for electrical panels or machinery operating under safety-critical conditions.

Other technical characteristics include density of 1160 kg/m³, water absorption of only 0.05%, abrasion resistance of 190 mm³, moulding shrinkage of 1.8%, and elongation at break rated at 470%. The knob complies with the UL94 HB standard (1.5 mm), assuring safety for industrial environments.

This RS PRO clamping knob is frequently used in manufacturing, equipment panels, laboratory setups, and wherever manual fastening, adjustment, or ergonomic comfort is essential, especially in settings where electrical insulation and material safety are critical.

Multiple lobe design enhances grip and torque for precise manual adjustments. High-quality polypropylene and thermoplastic elastomer structure for durability and ergonomic comfort. Brass insert provides superior strength and corrosion resistance for secure mounting.

UL94 HB-rated flame retardant material ensures compliance with industrial safety standards. Threaded through-hole mount fits a wide range of machinery and control panels. Electrical resistivity and low water absorption suitable for electrical and moisture-prone environments.

Tensile and tear strength deliver reliable performance in demanding applications. Ideal for industrial, laboratory, and mechanical uses. Discover more in RS PRO’s industrial knobs and browse Clamping Knobs selections for optimal equipment control and reliable fastening solutions on EnvMart.