An A 490 Hexagonal Bolt is highly similar to A 325 Bolt except that it’s made of either medium carbon and alloy steel, weathering steel, and metric A 490. An A 325, on the other hand, can be made from medium carbon, medium carbon steel alloy, carbon boron, and weathering steel. Both A 490 and A325 are no longer used. F3125 replaced it.

Bolts are one of the most used elements in construction and other industries as they are necessary for holding materials or objects together. Its parts include the head and a threaded cylindrical body. Nuts and washers are oftentimes partnered with it to secure the attachment.

Hex bolts are also called hexagon screw head bolts, hex cap bolts, hex-cap screws, or machine bolts. They are a very common choice when it comes to construction and repair. There is a variety of sizes and diameters. Whichever bolt you choose, just make sure that it’s from a credible bolt and nut supplier.