Precision Technology Supplies are one of the largest distributors of stainless steel hexagon headed fasteners in Europe. Our extensive stocks cover a wide range in both Metric to DIN specifications and American UNC / UNF threads to ANSI/ASME specifications. You can buy any of these online today. Hex Bolts, also known as Hex Caps or finished machine bolts, have a hexagonal six sided head and a machine screw thread. They are used with a hexagon nut or in a tapped hole. In the USA Hex Caps can either be part threaded or full threaded depending on the bolt length in relation to the diameter. Part threaded metric bolts are referred to as DIN 931 hexagon bolts and the fully threaded version are referred to as DIN 933 hexagon set screws. Applications for stainless steel bolts can vary from general construction and repair, exterior and automotive to marine, coastal, and high temperature environments depending on the material grade. Coach screws are also known as lag screws or lag bolts and are basically coarse threaded large hexagon headed wood screws. Uses range from lagging together lumber framing, machinery feet to wood floors, and other heavy carpentry applications. Coach Bolts are usually referred to as carriage bolts and have a plain domed head. They can be part or fully threaded depending on the length and have a short square section under the head for gripping into the part being fixed (typically wood). This prevents the bolt from turning when the nut is tightened. A flanged hex bolt is a bolt that has a flange (similar to a washer) cast under the hexagonal head of the bolt to enable it to be used without a flat or locking-style washer. The flange hex bolt is manufactured to spread the torque and clamping force of the bolt over a wider area than that of a typical hex head bolt. They are used a great deal in the automobile industry because the flange hex bolt allows faster installation than a comparable bolt and washer on assembly lines. PTS have the largest range of American Threaded (UNC / UNF) hex caps in Europe, starting at just 1un diameter. If you can't see the hexagon screws or bolts you need online then please call us on +44 (0) 1342 410758 or email us at email@example.com.