Technical Specification Rods that meet this specification are either made from AISI 4140 or 4142. Diameter range from 1/4 up through 2 1/2,, they must meet minimum yield strength of 105 KSI, and minimum tensile strength of 125 KSI. Features Features of these ASTM A193 Grade B7 Threaded Rods are: Durable, Long functional life, Reliable performance, and so on. In addition, our ASTM A193 Grade B7 Threaded Rods are as well being offered in different sizes and shapes to our respected clienteles.