(Adding other products will affect these rates)
50A21 sprockets are a ANSI standard size that has 21 teeth and works with #50 roller chain. These sprockets are known as a "Type A", which is a hubless roller chain sprocket. Our 50A21 plate sprockets are a durable, high strength sprocket that is manufactured from 1045CD carbon steel. After manufacturing, the teeth are hardened to help minimize wear, then a black oxide finish is applied for corrosion resistance.