Zinc Plated Mild Steel Square bolt (C bolt) - Extended leg complete with 1 full nut and 1 half nut on each leg To Suit 5050 RHS (Rectangular hollow Section) Ideally suited for use with standard rectangular hollow section, but of course will have many uses These 1125 series are extended leg for thickness of supporting material greater than 2A (twice bar diameter) Please refer to diagram for details (all measurements in mm): RHS : 50*50 A = 10 mm B = 51 mm C = 130 mm D = 80 mm Centers = 61 mm Our manufacturing tolerances are + / - 1 mm) We use roll threading so the diameter of the bar is usually less than the thread size. Please ask if unsure