HARFINGTON 20pcs Tee Wing Knobs Thumb Screws M4 x 25mm Standard Male Thread Plastic T Knobs Handles Hand Clamping Knobs Grip Thumbscrew, Black

Zinc plated carbon steel threaded studs on T knobs ensure durability, strength, functionality and wear resistance. Premium plastic clamping knobs provide durability, a smooth surface and comfortable grip. Sturdy and durable thumb screws for the ultimate in adjusting and tightening control.The tightly-in metal insert are machine-injected at high temperatures to securely connect the parts together, easy to install. T wing knobs are easy to grip and turn by hand, providing leverage and comfort, making it easier to tighten or loosen the knob. The threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs.Wing knobs with hand bolts are commonly used in applications that require frequent and quick adjustments or tightening. Widely used in lathes, drill presses, sawing machines, packaging and woodworking machinery, printing and industrial equipment, and fixtures.Note: Always tighten the thumbscrew knob securely to prevent any movement of the fixed assembly. Do not over-tighten the knob as this may damage or strip the threads in the mating assembly. Replace the knob if necessary.