This document specifies the terms and definitions, types, dimensions and tolerances, technical requirements, inspection items and acceptance inspections, test methods, markings, packaging and quality certificates of weathering steel bolts and nuts for transmission towers. This document is applicable to weather-resistant steel hexagonal head bolts (hereinafter referred to as "bolts"), weather-resistant steel foot nails (hereinafter referred to as foot nails), weather-resistant steel hexagonal nuts (hereinafter referred to as foot nails) with atmospheric corrosiveness levels C1 ~ C3 and thread specifications M10 ~ M39 (hereinafter referred to as "bolts"). (hereinafter referred to as "nut"), weathering steel hexagonal thin nut (hereinafter referred to as "thin nut") and weathering steel flat washer (hereinafter referred to as "flat washer"). Weather-resistant steel fasteners used in power fittings and other weather-resistant steel structures may be implemented by reference.
T/CISA 193-2021 history
2021T/CISA 193-2021 Weathering steel bolts and nuts for transmission towers