HARFINGTON 10pcs Knurled Clamping Knobs Thumb Screws M4 x 12mm Metric Male Thread 13mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black

HARFINGTON 10pcs Knurled Clamping Knobs Thumb Screws M4 x 12mm Metric Male Thread 13mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black

• Size - Standard metric thread size: M4 (0.7mm pitch); thread length: 12mm / 0.47"; head size: 13mm x 8mm / 0.51" x 0.31" (D*T); step size: 10mm x 2mm / 0.39" x 0.08" (d*t); total length: 22mm / 0.87"; color: black; knob style: knurled
• Material - 304 stainless steel threaded stud provides excellent corrosion resistance, oxidation resistance and high strength, ensuring durability and stability, preventing rust and providing reliable performance in various environments. Matte plastic is often more resistant to scratches and wear than glossy finishes, and is less likely to show fingerprints or smudges, maintaining a cleaner appearance over time.
• Features - Knurled texture on the hand knob surface provides better grip, making it easier to tighten or loosen the knob. Tightly-in threaded metal stud insert is machine-injected at high temperatures to securely connect the parts together, easy to install. Matte surface enhances grip, making it easier and more comfortable to hold.
• Applications - Knurled thumb screws are commonly used in applications that require frequent adjustments or tightening. Metric male hand knobs can be widely used in lathes, drill presses, sawing machines, packaging and woodworking machinery, printing, instrument and industrial equipment, and fixtures.
• Note - Always tighten the threaded knob handle 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 black plastic hand knob if necessary.