MCTi 6 Pieces Mountain Bicycle Bike M5x18mm Titanium Allen Hex Tapered Head Stem Bolts Screw 6AL/4V Gr5 with washer (Ti) Size: M5x18mm Allen Hex screws; Color Avaiable: Colorful,Ti,Gold Material: 6AL/4V(TC4)Titanium Alloy,Grade 5; Weight:2.08g/Piece. Thread Pitch:0.8mm; Thread Diameter:5mm; Head Diameter:8.46mm; Head Height:5.18mm MCTi Brand Trademark Bolt is with high performance,corrosion-resistant,light weight,high strength. Many applications in sports,mountain bike,motorcycle,automotive,racing,aerospace,medical industry.