Threaded Road is used in conjunction with the strut channel and other miscellaneous hardware to hang duct work where it requires a heavy application. Made from Low Carbon steel - ASTM A307 - Grade A. Material Meets ASTM A307 Grade A. Zinc Plating meets ASTM F1941 FeZn3A Hot-Dip Galvanized meets ASTM A153. Threads meets commercial nut fit similar to Class 1A. Typical Hardness meets HRB 70-100 Tensile Strength 60,000 PSI Min
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