1 Pair Bike Track Hub Axle Nut Fixed Gear for Bolt Screw Fastener Washer M10 Description: High strength, corrosion resistance. A flange nut has a wide flange at end that acts as an integrated, non-spinning washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. Mountain bike road bike fixed gear DIY modified accessories. It is suitable for bike rear hub. Specification: Material: Chrome Plated Steel Outer Diameter: Approx. 22mm / 0.86inch Height: Approx. 15mm/ 0.59inch Color: Silver Package Includes: 1 Pair Bike Nuts High strength, corrosion resistance. A flange nut has a wide flange at end that acts as an integrated, non-spinning washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. Mountain bike road bike fixed gear DIY modified accessories. It is suitable for bike rear hub.