Type 28S, Crossover 90° - 25x25 mm

Angle of continuous upright - 25 mm. Corner connection (90°), where the vertical tube runs through the clamp.

Side Outlet Tee - 25 mm. 3-direction clamp used to fix uprights with 3 horizontal tubes that are perpendicular to each other. The upright tube passes through the clamp.

A cross with four slots. A 4-way clamp used to attach uprights with 4 horizontal tubes perpendicular to each other. The standpipe passes through the clamp.
Suitable for square tube 25 x 25 mm

Hook twisted - 25 mm. Suited for making coat hangers and the like.
Suitable for square tube 25 x 25 mm

Collar Plate Double Side 90°. Panel fixing with two lugs also used for locking gates.

Female Single Socket. Often used together with other brackets, such as Type 36, 38, and 40. One part of swivel fitting, not generally used alone.