10Pcs M8 X 40mm Knurled Head Screws, Threaded Hand Knob Star Nut M8 Thread Clamping Bolt with Nut, Thread Clamping Knobs with Handle.

[Size]M8 internal thread head diameter: 32 mm, thread diameter: 8 mm, screw length: 40 mm. [Material]The star screw set is made of PP material and galvanized iron. The nut surface is galvanized, which is not only wear-resistant, corrosion-resistant, and high-temperature resistant, but also rust-resistant and has a long service life. [Star-Shaped Design]Screws with star-shaped nuts, easy to tighten by hand without the need for other tools. [Easy to Replace]A loose, broken, or missing nut can be replaced with a star-shaped locknut. [Wide Application]The M8 x 40 mm threaded clamping knobs are suitable for most machine tools, such as instruments and household, food, and industrial appliances.