Light Grey Perpendicular Connector 3 x 3 Bent with 4 Pins - 8 pack - LEGO® Part 55615
Pin Connector Perpendicular 3L with 4 Pins - 8 pack - LEGO® Part 48989
Light Gray Technic 1/2 Bush - 100 pack
LEGO® Part 4265c
Light Gray Technic Bush - 100 pack
LEGO® Part 3713
Black Axle and Pin Connector Perpendicular Double - 10 pack - LEGO® Part 32291
Black Technic, Axle and Pin Connector Perpendicular 3L with Center Pin Hole - 10 pack - LEGO® Part 32184
Black Technic, Pin with Friction Ridges Lengthwise and Pin Hole
LEGO® Part 15100
Light Gray Technic, Axle and Pin Connector Perpendicular 3L with 2 Pin Holes - 10 pack
LEGO® Part 42003
Light Gray Technic, Liftarm 5 x 11 - 2 pack
LEGO® Part 64178
Light Gray Technic, Liftarm 5 x 7 - 2 pack
LEGO® Part 64179