Amazon.com: Gobricks GDS-933 Technical, Axle Connector Hub with 3 Axles compatible with lego 57585 All Major Brick Brands Toys Building Blocks Technical Parts Assembles DIY (194 Light Bluish Gray(071),20 PCS) : Toys & Games
LEGO PART 6538b Technic Axle Connector Ridged [with x Hole x Orientation] | Rebrickable - Build with LEGO
Cada 32016 Technic Axle and Pin Connector Angled #3 - 157.5 degrees – Joy Bricks
LEGO Technic connectors - axle connection 2L with "x" - opening (smoot