TT BOLT is a manufacturer and supplier of industrial fasteners, specializing in high-quality bolts, nuts, washers and custom fastening solutions.
Our products are manufactured according to international standards including DIN, ISO, ASTM and ASME, serving industries such as construction, oil & gas, petrochemical, mining, power generation, heavy machinery and infrastructure projects.
ASME B18.2.2 Hex Nut — ASTM A563 Grade A Nominal size: 3/8 Thread: UNC 16 TPI Thread direction: Right Hand Width across flats: 0.551–0.562 in Width across corners: 0.628–0.65 in Nut height: 0.32–0.337 in Material specification: ASTM A563/A563M Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 7.789 g/pc
ASME B18.2.2 Hex Nut — ASTM A563 Grade A Nominal size: 5/16 Thread: UNC 18 TPI Thread direction: Right Hand Width across flats: 0.489–0.5 in Width across corners: 0.557–0.577 in Nut height: 0.258–0.273 in Material specification: ASTM A563/A563M Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 5.248 g/pc