Ballshaft! | New Elementary: LEGO® parts, sets and techniques
Lego Technic 1x Steering Ball Joint Large Ball Padded Swivel Axle 92910 New | eBay
LEGO Black Technic Ball Joint 32474
Building Blocks Bulk Technical Parts 2pcs POWER JOINT & 2pcs POWER JOINT BALLPART compatible with lego for kids boys toy|Model Building Kits| - AliExpress
LEGO part 47296 - Dark Bluish Gray Technic, Axle and Pin Connector 2 x 5 with Two Ball Joint Sockets at BrickScout
LEGO® 4143539 - 4290713 32474
BrickLink - Part 53585 : LEGO Technic Ball Joint with Through Axle Hole [ Technic] - BrickLink Reference Catalog
Its new to me: stiffening the joints with Element 74261/6106472 (Element Exposition) | The Rambling Brick
LEGO Sets with Part 57909 Brick 2 x 2 with Ball Joint and Axlehole, Technic Modified Axle Hole
Lego Technic Axle and Pin Connector 47296 with Two Ball Joint Sockets | eBay