SKF 71902 CE/HCP4ADGA Single Row Angular-Contact Ball Bearing, High Precision Ball Bearings Set, (Two Pcs) - 15 mm ID, 28 mm OD, 7 mm Width Ratcheting SAE Wrench The base threaded nut is

The base threaded nut is carbon steel with a black-oxide and wax finish for corrosion protection (a stainless steel version is also offered)

Drill America Killer Force Bit Cooler

and retain bearings and power transmission assemblies on a threaded shaft

Drill America M42 Cobalt Bit Cooler

SKF 71902 CE/HCP4ADGA Single Row Angular-Contact Ball Bearing, High Precision Ball Bearings Set, (Two Pcs) - 15 mm ID, 28 mm OD, 7 mm Width Ratcheting SAE Wrench The base threaded nut isSpindle Bearing Spindle Bearings from SKF are designed for reliable performance in demanding industrial applications. Suitable for use in a wide range of industrial applications where reliability and performance are essential.