4 Pcs T-Shaped Wing Knobs, M6 x 40mm Thumb Screws, Standard Male Thread, Plastic Handles, Hand Tightening Knobs, Thumb Screws, Black.

Size - Standard thread size: M6 (1 mm pitch); Thread length: 40 mm / 1.57"; T-shaped head width: 36 mm / 1.42"; Total Length: 55 mm / 2.17"; Knob Style: T; Color: Black (Threads are clean and clear, force is even and deep, they do not slip easily and have no burrs). Material - The zinc-plated carbon steel threaded stems of the knobs ensure durability, strength, functionality, and wear resistance. The high-quality plastic clamping knobs offer durability, a smooth surface, and a comfortable grip. Features - The tightly fitting metal inserts are high-temperature injected to ensure a secure connection of the parts and are easy to install. The T-shaped wing knobs are easy to grip and turn by hand, providing a better grip and comfort, making tightening or loosening the knob easier. Applications - Thumb screw knobs with hand bolts are commonly used in applications requiring frequent and quick adjustments or tightening. They are widely used in lathes, drills, packaging and woodworking machines, industrial and printing equipment, and fastening devices. Note - Always tighten the thumb screw knob securely to prevent movement of the fixed assembly. Do not overtighten the knob, as this may damage or deform the threads of the corresponding assembly. Replace the knob if necessary.