Bicycle axle nuts SOLD IN SETS OF 4 Threading: 3/8" X 24T (fits VERY FEW BMX WHEELS... typically found on coaster brake hubs) Color: BLACK (PVD treatment) Material: TITANIUM  Grade 5 (6AL-4V) Weight: 9 grams per nut (36 grams per set of 4 compared to our swivel washer steel nuts which weigh 66 grams per set of 4) * TORQUE TO MAXIMUM 27 ft-lbs (be sure your professional installer knows this is the maximum torque).