Tensile strength is typically rated at 170,000 psi. Let’s talk about 8740 chrome-moly steel. ... On the left is an SAE J429 Grade 1 or 2 bolt with no head markings.

Common steels are SAE 1010 (machine screws, carriage bolts, and other fasteners without critical strength requirements); SAE 1018, 1020, 1021 (bright cap screws, special items); SAE 1038 (high ...

Most metric bolts you'll find in the hardware store are stamped with some sort of marking. For example, a metric bolt might have an "8.8" or a "10.9" stamped on its head while a standard U.S ...