A193-B7

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.

Grades: 
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  

Recommended Nuts:
A194-2H Nuts

Recommended Washers:
F436 hardened Washers – or flat cut washers at customer’s request.