Amazon.com: LEGO Parts and Pieces: Technic Blue (Bright Blue) Axle Pin with Friction x100 : Toys & Games
4 x NEW LEGO TECHNIC AXLE & PIN CONNECTOR 3L & CENTER PIN HOLES 6257335 6276984 | eBay
Technic, Axle and Pin Connector Angled #6 - 90 degrees
Lego Technic Axle Pin 43093 (x36) Blue with Friction Ridges | eBay
Technic, Axle and Pin Connector Hub with 1 Axle : Part 22961 | BrickLink
Amazon.com: KonHaovF 116PCS Gear and Axle Set for Technic Parts Compatible with with Major Brand Technic Parts, DIY Gears Assortment Pack(Gears Pins Axles Differential New) for Technic Building Blocks Set : Toys
Technic, Axle and Pin Connector Perpendicular : Part 6536 | BrickLink