Specification Brand : HARFINGTON BulletPoint1 : Size - Standard metric thread size: M8 (1.25mm Pitch); thread length: 80mm / 3.15"; head size: 28mm x 16mm / 1.1" x 0.63" (D*T); step size: 19mm x 4mm / 0.75" x 0.16" (d*t); total length: 96mm / 3.78"; color: black; knob style: knurled BulletPoint2 : 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. BulletPoint3 : 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. BulletPoint4 : 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. BulletPoint5 : 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. Color : Black ItemName : HARFINGTON 6pcs Knurled Clamping Knobs Thumb Screws M8 x 80mm Metric Male Thread 28mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black ItemPackageDimensions_Height : 1.57 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 6 ItemTypeKeyword : knurled-knobs Manufacturer : HARFINGTON Material1 : Stainless Steel Material2 : Plastic ModelNumber : hta240825hh000440 PartNumber : hta240825hh000440 ProductDescription : 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. The knurled texture on the hand knob surface provides better grip, making it easier to tighten or loosen the knob. The threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs. Tightly-in threaded metal stud insert is machine-injected at high temperatures to securely connect the parts together, easy to install. The matte surface enhances grip, making it easier and more comfortable to hold. 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. Knurled thumb screws are commonly used in applications that require frequent adjustments or tightening. The 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. 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.