This mech hanger bolt is very similar to a standard single chainring bolt, although slightly narrower, but the same diameter, with a 5mm allen key fixing. And will only fit certain gear mech hangers, price is for both parts, male and female. Please note that this bolt does not fit the following hangers D17 Hanger and our D57 GT hanger, for this please see our Gear mech hanger bolt for our D17 mech hanger and D57 Hangers Only Please also note that this bolt will NOT fit the D193 mech hanger, this hanger uses a specific Trek only size. If you are unsure, please ask to avoid confusion.
