RS PRO Black Knurled Clamping Knob, M4, Unthreaded Hole

Knobs are used in a wide variety of applications in our day-to-day lives and perform many functions, from being used as fixed handles to being used to tighten, loosen, adjust, clamp and push other components or pieces of equipment. They are used in various applications, from industrial and construction machinery to audio and visual equipment.

Self-assembly thumb screw knobs: M3 (RS 771651), M4 (RS 771667), M5 (RS 771673), M6 (RS 771689), M6 (RS 771695), M8 (RS 771702).

• Acetal thermoplastic resin


• High tensile strength yet light in weight


• Temperature rating -40°C to + 120°C


• Can be paired with socket head cap screws to create thumb screw knobs

Designed with flexibility in mind, these knurled knobs allow the user to control the length of the knob thread, granting them a vast range of possible applications. The knurled sides provide additional grip for the user, while the low height allows these knobs to be used in space-restricted areas. Possible applications include:

• Fabrication/industrial machinery


• Clamps and fixers


• Storage and general furniture