What is this? Knurled thumb screws are widely used in home improvement projects, electronic equipment, mechanical equipment, communication industry, automobile, lighting industry, etc. They are reliable fasteners for various tasks. Mainly used in DIY projects, furniture, fixing panels, mechanical parts, decorative products, etc. What will I get? Material: 304 Stainless Steel Thread Size: M4 x 16 mm / M4 x 0.63 inch(D*L) Head Size: 8 x 6 mm / 0.31 x 0.24 inch(D*T) Thread Pitch: 0.7mm Color: Silver Package Content: 10 Pcs x Knurled Head Thumb Screws Are there any advantages of the product? The flat thumb screw is made of 304 stainless steel, which has excellent durability and corrosion resistance, and has a long service life. Wear-resistant, uniform force, and good fastening performance. The thumb screw head adopts a flat knurled surface to provide better grip, making the screw easier to tighten or loosen. How to use it? Easy to install. The fully threaded thumbscrew has a secure grip and smooth surface, making it easier to hand-tighten or loosen fasteners. Simply hold the knurled head and turn the screw, no tools required. What should I notice? Check the thumb screws regularly for wear or looseness, and replace if necessary to maintain performance. Please choose the appropriate type and size before purchasing.