Product description:

Material: made of iron, high hardness, no rust, good corrosion resistance.

Thread size: M4, pitch: 0.7mm

Easy to use: This nut has a knurled surface and can be easily tightened, assembled and disassembled without any tools.

Application: Commonly used in 3D printing machine beds, machine tools, cabinets, toolboxes, great for fabrication projects and things that need to be adjusted quickly.

Package includes:6pcs knurled thumb nuts, M4x0.7mm 304 stainless steel round knob fasteners