Technic, Axle 1L with Pin without Friction Ridges : Part 3749 | BrickLink
Amazon.com: LEGO Parts and Pieces: Technic Blue (Bright Blue) Axle Pin with Friction x100 : Toys & Games
Technic, Axle and Pin Connector Angled #5 - 112.5 degrees
Technic Building Tips - Strong Connections - LEGO Education
Technic Axle Pin Connector 3 x 120° Ring | BrickCamp
Amazon.com: KonHaovF 182PCS Gear and Axle Set for Technic Parts Compatible with Lego Technic Parts, DIY Gears Assortment Pack(Liftarm, Pins, Axles, Connectors) for Technic Building Blocks Set : Toys & Games
LEGO® Technic Spare Parts - LEGO® Technic Axle 1L with Pin with Friction Ridges - The shop Briques Passion