Premium Material: Made of high-quality carbon steel which is durable and sturdy enough to be used in bike hubs and not easy to break and deform.
Features: Double screw thread structure to make sure snug fit the bike hubs and nuts inside with anti-slip tread is work well for tightening.
Application: Be used to front and rear axles of bike, such as MTB, BMX, kids bike, etc. Usually M8 use for front axles, M9,M10 use for rear axles.
Precise size: The front axle hubs nut:M8: 0.6inch/1.5cm in outer diameter, 0.31inch/0.8cm in inner diameter, 0.28inch/0.7cm in height; The rear axle hub nut: M9.5: 0.75inch/1.9cm in outer diameter, 0.4inch/1cm in inner diameter, 0.36inch/0.9cm in height; M10: 0.71inch/1.8cm in outer diameter, 0.4inch/1cm in inner diameter, 0.31inch/0.8cm in height. Safety washers: 0.39inch/1.0cm and 0.33inch/0.8cm respectively.