Fastening screw Hi-Lo®

for plasticscountersunk headslotted

The Hi-Lo fastener, with its unique thread form, improves fastener performance in a broad range of low density materials such as plastics,wood, masonite and particle board. This fastener is designed with a double lead, consisting of a high and a low thread. The high thread is sharper than a conventional thread, having a 30° included angle. The low thread has the 60° included angle and a height that is 40% to 50% of the high thread height. Reduced Cracking, Splitting And Boss Breakage The superior performance of the Hi-Lo fastener increases product quality and decreases costs. The 30° included angle of the high thread form reduces radial or bursting pressure to one-half of that generated by the conventional 60° included angle thread form. Boss cracking in plastic is dramatically reduced and smaller diameter bosses can often be specified. In wood applications, even when driving close to the edge, splitting is greatly reduced due to this lower radial pressure.