Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 32123a Technic Bush 1/2 Smooth with Axle Hole Reduced Alternate of this part
• 32123b Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Alternate of this part
• 4265a Technic Bush 1/2 Toothed Type I [+ Opening] this part is a mold of it
• 2711 Technic Plate 1 x 5 with Toothed Ends, 2 Studs and Center Axle Hole this part is a pair of it
• 2712 Technic Plate Rotor 3 Blade with Toothed Ends and 3 Studs (Propeller) this part is a pair of it
• 2719 Technic Plate 1 x 10 with Toothed Ends this part is a pair of it
• 2792 Technic Steering Rack Top - Modified 1 x 8 Technic Plate with Toothed Ends this part is a pair of it
• 3139 Tyre 14 x 4 Smooth Small Single this part is a pair of it
• 3641 Tyre 15 x 6 Offset Tread Small this part is a pair of it
• 4084 Tyre 21 x 8 Offset Tread Medium this part is a pair of it
• 4262 Technic Plate 1 x 6 with Toothed Ends this part is a pair of it
• 4263 Technic Plate 1 x 4 with Toothed Ends this part is a pair of it
• 4273b Technic Axle and Pin Connector Toggle Joint Toothed [with Slots] Pair of this part
• 4442 Technic Plate 1 x 8 with Toothed Ends this part is a pair of it
• 59895 Tyre 14 x 4 Smooth Small Single [New Style] this part is a pair of it
• 6542a Technic Gear 16 Tooth with Clutch [Toothed] this part is a pair of it
• 87414 Tyre 15 x 6 Offset Tread Small with Band around Center this part is a pair of it