This bolt spec is commonly used for high pressure and temperature connections such as valves, flanges and fittings. Primarily used in waterworks projects and pipelines. This bolt spec covers a heavy hex head bolt, a bent anchor bolt, fully threaded rod and a threaded end bolt. A193-B7 is high tensile and is one of the strongest grades you can galvanize without causing hydrogen embrittlement.
B7: Alloy steel, AISI 4140/4142 quenched and tempered
B8: Class 1 Stainless Steel, AISI 304, carbide solution treated
B8M: Class 1 Stainless Steel, AISI 316, carbide solution treated
B8: Class 2 Stainless Steel, AISI 304, carbide solutions treated, strain hardened
B8M: Class 2 stainless Steel, AISI 316, carbide solution treated, strain hardened
F436 hardened Washers – or flat cut washers at customer’s request.