Malleable iron castings with a streamlined appearance that are both extremely versatile and economical. Simple to fit as the tube slides into the socket and is firmly secured in position with a hex key-operated socket screw. The standard Size 8 clamps fit regular 48.3 mm Ø scaffolding tube or aluminium pipe. The smaller Size 6 fits 33.7 mm Ø tube. To obtain maximum slip loads, tighten to 40 Nm [page 174 for Torque Wrenches]. Technically, the correct hex keys to use are 1/4” and 5/16”. We find a metric 6 mm a bit too sloppy in the 1/4”, but an 8 mm works very well in the 5/16”[7.93 mm]. If you are constructing hanging ladder beams for lanterns we would recommend that you drill right through the corner fittings and tube and use a high tensile bolt to ensure nothing works loose. All the fittings are available galvanised, with a select range in Black Powder Coat. Other fittings also available in black — please phone for a quote. We can also cut all your tube to length ready for a speedy fit-up [page 232].