National offers precision inch and metric ball bearings specializing in miniature, aircraft and industrial applications. ABEC 3, 5, and 7 grade miniature bearings are available. Angular contact, double row ball and roller bearings, and caged needle roller bearings are also available. Other offerings include stainless steel and plastic bearings, self-lubricating bearings, military and airframe control bearings, bushings and rod ends. Aviation instrument and dental bearings are always available.