These socket head cap screws all come in U.S. sizing in inches and are made from alloy steel with black oxide. With sizes ranging from #4-40 to ¼-28 fine and more, you can rest easy knowing that the size you need is just a few clicks away. Monster Bolts is your top one stop shop when it comes to finding screws, bolts, nuts, washers, and more online! We know what it takes to create a seamless and durable project. It all begins with the little details. For nuts, bolts, screws and more that will always deliver a job well-done, it’s time to shop Monster Bolts.