Wewean M4 Threaded Knurled Thumbscrew 100pcs Carbon Steel Knurled Handle Bolts Grip Mounting Thumb Screw Knobs Monitor Mounting Screws Round Clamping Screws Grip Knobs M4 x 10mm E1276

Features: Knurled Knobs: Black clamping knurled hand knobs. It is sturdy and durable. Provide comfortable hand grip. Screw on type design for easy installation. Great replacement accessories for your lathe. Wide Applications: Clamping knurled knobs universally fit most types of machine tools. Can be used for milling machine lathe grinding machine mechanical equipment instrument and industry equipment. Specifications: Material: Carbon steel Color: Black Male Thread Diameter: 4mm/0.16 inch Male Thread Length: 10mm/0.39 inch Total height: 21mm/0.82 inch Head Diameter: 14mm/0.55 inch Quantity: 100 pieces in total Package Includes: 100 x Threaded Knurled Thumbscrew Note: -Please allow slight dimension error due to manual measurement. -The color may exist slight difference due to different screen displays. -It is recommended that you need washers as gaskets when installing some monitors to prevent affect to the computer monitor. -The length of the screw part is 10 mm which may bottom out on some computer monitors; You just need a layer of buffer to prevent direct contact in some cases.