RS PRO Phenolic 4-Arm Clamping Knob M6 Threaded Stud 38 mm Diameter 40mm Stud Length 686-626

RS PRO 686-626 is a high-quality phenolic clamping knob engineered for industrial and commercial machinery applications where reliable manual fastening or adjustment is required. This model features a four-arm star shape, providing improved ergonomic grip and torque for ease of tightening or loosening by hand.

The knob body is made from wood-filled phenolic, ensuring high impact resistance and durability, suitable for environments exposed to mechanical stress and frequent use. The embedded M6 threaded stud is made from zinc-plated steel, delivering wear resistance and assuring longevity of the threaded connection.

With a knob diameter of 38 mm and a stud length of 40 mm, the RS PRO 686-626 enables secure mounting and accurate adjustment on panels, machinery, clamps, access doors, and drawers. The four-lobe contour gives users a comfortable grip, allowing application of manual torque without tools. The hole diameter (18 mm) and hole length (8 mm) facilitate versatile installation options.

It meets EN 61340 and BS771 standards, ensuring electrical safety and mechanical reliability for sensitive equipment. The knob is developed to operate within a working temperature range of -30°C to +140°C, providing stability for diverse industrial environments. Its chemical resistance makes it tolerant to weak acids and chlorinated hydrocarbons, further extending its usability in labs, production, and commercial settings.

Common applications include machine access doors, clamps, fixture panels, drawers, control panels, and anywhere robust manual fastening is necessary. The RS PRO phenolic clamping knob series is trusted for maintenance, adjustment, and assembly in industrial, laboratory, construction, and manufacturing operations.

Explore the complete RS PRO industrial hardware line in the Clamping Knob category for additional options and compatible accessories with similar safety and performance standards.