SODIAL(R) M8 x 50mm Thread Replacement Star Hand Knob Tightening Screw Black Silver Tone Product Name : Star Knob;Type : Screw Type;Head Size : 38.5 x 35 x 12mm / 1.5" x 1.4" x 0.47" (L*W*T) Thread Length : 50mm / 2";Thread Diameter : M8 (8mm) / 5/16" Total Length : 72mm / 2.8";Material : Metal, Plastic Color : Color;Silver Tone, Black : Silver Tone, Black Net Weight : 31g;