![]() Fastening a nut on a motorcycle or vehicle wheel.When the prongs of the pin are pulled well apart, they provide a stable hold and won't slip out.Ĭotter pins are ideal for use with bolts intended for machinery that moves or vibrates. Once the pin is all the way through the hole, you twist the ends of the pin outwards so that they pull away from each other. To attach a cotter pin to a compatible bolt, you simply slide it into the hole. Certain types of bolts are specifically designed for use with cotter pins and have pre-drilled holes for this purpose. The primary use for a cotter pin is to secure a bolt by slipping into a hole drilled in the bolt body. There are also different styles of cotter pins available, from extended prong pins to R-shaped pins. These U-shaped pieces of metal with a wide circular top can be made from stainless steel or zinc and come in a range of sizes. What Are Cotter Pins?Ĭotter pins, also known as split pins, are designed to hold bolts in place. When you need cotter pins that are going to work hard each day, just like you do, find the toughest cotter pins available when you choose FMW Fasteners as your supplier. A cotter pin is a two-pronged fastener made from metal that installs easily while providing structural support.įMW Fasteners offers both zinc-plated and stainless steel cotter pins. These pins are commonly used to secure castle nuts.Cotter pins, while simple in design, are infinitely useful when you need to keep pieces of machinery in place and secure over a period of time. Hammerlock cotter pins are installed and locked in place with a hammer strike. CircleĬircle cotters, or cotter rings, conceal sharp edges internally to protect materials such as fabrics that may be susceptible to damage. This design allows for a more securely locked assembly. Styleīow tie cotter pins feature a loop on both ends of the pin, allowing for push or pull installation from either side of a hole. It offers the highest strength compared to other metals and elements, but is the least corrosion resistant. The most common material used in fasteners, this material is predominantly iron mixed with carbon. ![]() There are over 150 grades of this material with the 304 and 316 series being the most common. The chromium forms a protective layer when exposed to oxygen, keeping the steel underneath from corroding. This material is known for its corrosion resistance and has varying strengths depending on the amount of chromium and nickel alloy. Stainless SteelĪn iron based material with a minimum of 10.5% chromium. Used in locks, gears, doorknobs, plumbing, electrical applications and musical instruments. It has excellent cold working (forming at room temperature) properties. As an electroplated finish it is nonmagnetic and resists corrosion well. This material has a distinctive bright golden coloring and is primarily used in aesthetic settings or in applications where low friction is necessary. This material has a general composition of 2/3 copper and 1/3 zinc. The corrosion resistance and ease of fabrication are why this grade is used in food industry machines, appliances, architectural trim and aquatic fasteners. The ASTM denotation for very similar grade is 304. It is comparable in strength to grade 2 materials, yet slightly weaker and easy to weld. A2-70Ī type of the most common stainless steel grade. The DIN/ISO denotation for a very similar grade is A4-70. It is used in more severe corrosive environments than 304 stainless steel, as such it is used in more industrial settings, like process chemicals, textiles, bleaches, salt water and rubber. It is on the low middle end of the grade scale. The second most common stainless steel grade, this material is stronger than grade 2, slightly weaker than grade 5,or generally as strong as medium to low carbon steel. This finish should not be used in marine or high salt spray environments. Slightly less corrosion resistant than yellow zinc, it is a versatile finish that is best used indoors. It is a popular finish because of its protection, value, and ease of coating. The zinc protects the steel from corrosion and the chromate layer protects the zinc from degrading. It is an electroplated zinc layer covered with a chromate post-treatment. This finish, also know as zinc plating, zinc chromate or dichromate provides good corrosion resistance and is the standard for many hardware fasteners. This most basic finish can be used when protection is not an issue or indoors. This finish is susceptible to rusting and corrosion in exterior environments. Often the surface has been oiled which improves lubricity. Nothing has been done to this bare metal surface to improve appearance or corrosion resistance, which is very low if the material is steel.
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