uxcell 8pcs Knurled Clamping Knobs M4 x 20mm Metric Zinc Plated Carbon Steel Male Thread Thumb Screw on Type 15mm Plastic Round Head Threaded Hand Bolt Stud Knobs Black

Features

• Standard Thread Size: M4 (0.7mm Pitch); Thread Length: 20mm / 0.79"; Knurled Head Diameter: 15mm / 0.59"; Total Height: 31.5mm / 1.24". The screws are neat and clear, the force is even, and it is not easy to slip.
• Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control. Great for saw, drill press, lathe and routing jigs, fixtures, packaging machinery, printing equipment, woodworking machinery and equipment.
• Zinc plated carbon steel threaded stud enhances the durability, making it resistant to wear, corrosion and rust. The tightly-in metal insert ensures optimal durability and functionality, easy to install.
• Hand stud knobs with thermoset plastic knobs provide comfortable hand grip. The clamping knob is tight, sturdy and durable, with a smooth and beautiful surface.
• Screw on type design for easy install. Always tighten the knurled knob securely to prevent any movement of the fixed assembly. Do not over-tighten the knob as this may damage or strip the threads in the mating assembly. Replace the stud knob if necessary.