<br><br>Thread Size: <br>M8 x 30mm/ 0.30 x 1.5inch(D*L) <br>M6 x 20mm/ 0.23 x 0.8inch(D*L) <br>M4 x 12mm/ 0.15 x 0.47inch(D*L) <br><br>M8 Screw Knob Head Dia (Approx): 38mm / 1.47inch <br>M6 Screw Knob Head Dia (Approx): 32mm / 1.26inch <br>M4 Screw Knob Head Dia (Approx): 25mm / 0.98inch <br><br>Material: steel, plastic.<br><br>Metric thread <br><br>Thread Pitch: <br>M8 Thread Pitch 1.25mm <br>M6 Thread Pitch 1.0mm <br>M4 Thread Pitch 0.7mm <br><br><br>Package : <br>10PCS M4 x 12mm/ 0.15 x 0.47inch(D*L) Hand Knob Tightening Screw <br> 8PCS M6 x 20mm/ 0.23 x 0.8inch(D*L) Hand Knob Tightening Screw <br> 8PCS M8 x 30mm/ 0.30 x 1.5inch(D*L) Hand Knob Tightening Screw