![]() ![]() Because the anti-corrosive properties are inherent to the metal, it will not lose this resistance if scratched during installation or use. Stainless steel is highly corrosion resistant for the price. Stainless steel is an alloy of low carbon steel and chromium for enhanced corrosion characteristics. What are the properties of Stainless Steel fasteners? We sell both and they can be requested per the customers requirements and application. There is thread the entire length of the set screw, whereas a bolt is only partly threaded at the end and has a shank up to the head. (See Metal Reactions -below) What is difference between a bolt or set screw?Ī bolt or a set screw only differ due to the thread length. In some environments and applications, sea salt, wet weather and galvanic corrosion must also be considered if changing fastener materials. Also, some equipment is designed so that the bolts will fail before more expensive or critical items are damaged. Harder bolts tend to be more brittle and may fail in specific applications. Replacing a bolt or set screw with a stronger one is not always safe. When replacing fasteners, it is generally best to match what you are replacing. Should you use the same type of fastener your replacing? At Valley Fasteners we predominantly sell steel bolts and set screws due to its robust longevity for industrial uses. The material can be important when choosing a fastener due to differences between metals in this case for strength, brittleness, corrosion resistance, galvanic corrosion properties and, of course, costs. In addition, some materials are available with a variety of coatings or platings to enhance the corrosion resistance or alter the appearance of the fastener. Many materials are further separated into different grades to describe specific alloy mixtures, hardening processes, etc. But it’s the machinist who decides which tapping style to use depending on the job at hand.Got Questions | Ask Valley Fasteners What are fasteners made from?įasteners are manufactured in a wide range of materials from common steel to titanium, plastic and other exotic materials. Compare that to cut threads, which because of the tools used, cause grain structure to essentially fracture.Īlso, formed taps have a longer life, as they last about three to 20 times longer than cut taps.Ĭutting taps and forming taps both have benefits and limitations from stronger threads to greater compatibility. ![]() But machinists aren’t limited to the materials when they decide to cut taps.Ĭutting taps also have the upperhand regarding horsepower, as this threading method requires less power than forming taps.įormed threads are stronger because the grain flow of materials is compressed at the crest and root of the thread form. When machinists use forming taps, they can only use the process on aluminum, soft steel and nonferrous metals. The two threading methods tap holes differently, but they also have a handful of other differences, starting with the type of thread each method produces.Ĭutting taps are more versatile than forming taps and can be used with more materials. Additionally, forming taps usually require a larger hole because this style causes a material to thread away and into the threads of the tap. ![]() Forming taps involves the displacement of a material (like metal) within a hole. Unlike cutting taps, forming taps create external threads. This gradual cutting motion allows a tap to smoothly enter a hole. This process then leaves an internal thread that meets the machinist’s desires.Ī machinist achieves that geometric precision by using tools that come with a feature called the chamfer, which cuts a 90-degree angle or edge to make it more symmetrical. Cutting a tap means using tools that remove material from the tapped hole, according to North American Tool. When machinists need to create internal threads, they opt for cutting taps. Cutting taps and forming taps produce threads that are interchangeable and gauge identically, but those are the only similarities between the two tapping styles. ![]()
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