American ASTM A325 hexagonal bolt

        ASTMA325 is a Screw fastener product standard in the United States, equivalent to Grade 8.8. It is an American standard high-strength Bolt, which is a mechanical component suitable for cylindrical threaded screw fasteners with nuts. A type of screw fastener consisting of two parts: a head and a Screw Rod (a cylinder containing threads), which need to be matched with a nut to tighten and connect two components containing through holes. This type of connection is called bolted connection. If the nut is unscrewed from the bolt, it can separate these two components, so the bolt connection is a detachable connection.

       According to standard specifications, bolt characteristic levels are divided into more than 10 levels, including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. Among them, bolt materials of 8.8 and above are low-carbon alloy steel or medium carbon steel and undergo heat treatment processes (quenching and tempering), collectively referred to as high-strength bolts, while others are collectively referred to as ordinary screws，A325 Hex Bolt Half Threaded Bolt,Hexagon Headed Bolt,Heavy Hexagonal Bolt,American ASTM A325 hexagonal bolt