MCTi Mountain MTB Bike Stem Titanium Allen Hex Socket Cap Head Bolts Screw M5x15mm 4 Packed Colroful Size: M5x15mm Allen Hex Socket Cap Head; Color Available: Colorful,Gold,Ti Material: 6AL/4V (TC4) Titanium Alloy, Grade 5; Weight: 2g/piece. Thread Pitch: 0.8mm; Thread Diameter: 5mm; Head Diameter: 8.5mm; Head Height: 5mm; Key Size: 4mm; MCTi Brand Trademark Bolt is with high performance, corrosion-resistant, light weight, high strength and durability functions. Original Brand Packed. Many applications especially in sports, mountain bike, bicycle, motorcycle, automotive, racing, aerospace, medical industry and DIY areas.