ITEM NAME:M6 x 40mm Round Head Screw On Thumbscrews Knurled Knob Grips B8U1 M6 x 40mm Round Head Screw On Thumbscrews Knurled Knob Grips B8U1 Wonderful replacement for your broken one with this Knurled Knob. Screw on type design for easy install and with surface nice finish for comfortable grip. Widely used for mechanical equipment, instrument and apparatus, food and pharmaceutical industry equipment. Product Name: Knurled Knob Type: Screw On Head Size: 20mm x 12mm / 0.8inch x 0.47inch(D*H) Thread Length: 40mm / 1.6inch Thread Diameter: 6mm / 0.24inch(M6) Total Height: 50mm / 2inch Material: Metal, Plastic Color: Silver Tone , Black Weight: 15g Package Content: 1 x Knurled Knob Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.