These are Aerospace Grade 6AL4V Titanium M8x24 Titanium bolts with cap heads commonly used in BMX bicycle stems. Price is for 4 pieces as shown. 1.25 thread pitch. The head has a 13mm diameter and bolt includes a titanium washer as shown. Super lightweight and made not from lower grade titanium but from the best Grade 5 6AL4V Titanium. We offer a complete line of M3, M4, M5, M6 and M8 Titanium screws in button head, flat head and various lengths.