MCTi 6 Pcs MTB Bicycle Motorcycle Allen Hex Titanium Flange Lock Nut Metric Screw Washer M8 (Ti) Size: M8 Allen Hex Flange Lock Nut; Color Avaiable: Colorful,Ti,Gold Material: 6AL/4V(TC4)Titanium Alloy,Grade 5; Weight:4.24gram/piece. Thread Pitch:1.5mm; Thread Diameter:8mm; Head Diameter:18mm; Head Height:8mm MCTi Brand Trademark Bolt is with high performance,corrosion-resistant,light weight,high strength. Many applications in sports,cycling,motorcycle,automotive,racing,aerospace,medical industry.