Parker Tools and Fixings Tube Clamp Grub Screws are a simple and cost effective way of creating an endless variety of tubular structures without the need for welding. Our extensive range of fittings when combined with standard EN10255 tubing enables the user to create any structure imaginable for use in all manner of industries. All Tube Clamp fittings are supplied with stainless steel grub screws. In order to protect any exposed threads in outdoor installations, we recommend the use of an anti-corrosion galvanising spray such as the one sold as part of our Tube Clamp range. The grub screws can be tightened with an Allen key, however, if fully tightened using a ratchet key to a torque of 4.1kg/m (29ft/lb) the grub screw is capable of withstanding an applied slip load of 900kg. Tube Clamp are available in standard sizes and structure which you can buy online from the Parkertools in low trade prices.