This needle roller bearing guides motion along a track by means of a particularly thick-walled outer ring running on a full complement set of needle rollers, with an inner ring of bore diameter 5.0 mm and outside diameter 16.0 mm, mass 14.4 g. Axial guidance of the outer ring is provided by plastic axial plain washers together with contact washers, forming a three-stage sealing arrangement on both sides (PP). The thick-walled outer ring gives the design resistance to the radial loading typical of yoke type track rollers, while the full complement needle roller set increases the number of rolling elements in contact for a given envelope size. The plastic axial plain washers not only guide the outer ring axially but also seal the bearing on both sides, reducing the need for external protection and keeping grease inside the raceway. Its small dimensions (5.0 mm bore, 16.0 mm outside diameter) suit it to compact track and cam follower arrangements requiring low-friction rolling motion.