These Shimano chainring bolts are specially designed for the XT FC-M770 4-arm 3x cranks. They are inserted in the middle, i.e. between the middle and the large chainring. The corresponding inner bolts are available separately.
Threads: M8 x 9.1
Position: middle (w/ 3 chainrings)
Mount: between middle and largest chainrings
– XT FC-M770
Manufacturer Part Number: