10 mm x 1.0 x 1" long, 3/4" Hex Fully Threaded Axle Nuts

ONE: 10 mm x 1.0 x 1" long, 3/4" Hex nut Fully Threaded axle nut. 

They are turned down area is 11.97 mm or .4715" OD x .56" long to fit inside of the two 12 mm ID bearing.

These are made out of 303 Stainless Steel Hex Bar.