![]() Save my name, email, and website in this browser for the next time I comment. This fastener is also ideal for vibrating and rotating applications, and reduces the risk of being accidentally knocked or vibrated off. It’s easily released by lifting the loop and sliding the cotter pin off. Bow-Tie Locking Cotter: Works like a Hair-Pin Cotter, simply push or pull this cotter’s pin leg into the mating hole and the Bow-Tie snaps into a zero-tension locked position. It offers excellent security for vibrating and rotating equipment but is ideal for light to medium applications and offers fast, tool-less installation and removal.ģ. ![]() A manual secondary lock tensions the Rue Ring tight and dampens vibration. Rue Ring Locking Cotter: This cotter pin surrounds the shaft and locks itself on, making it one of the safest cotters available. They provide fast, tool-less installation and removal.Ģ. Hair-Pins are a spring-type cotter made to be reusable in less critical applications. Hair-Pin Cotter: Relatively secure, but high-vibration or rotating applications can cause accidental disengagement. Pivot Point, a manufacturer of non-threaded fastener solutions, recently released the basics on cotter pins, comparing five different types available.ġ. They’re either a wedge or tapered pin that’s driven into a hole. These pins are commonly used to secure castle nuts.A cotter pin is a simple fastener that’s used to secure a bolt or any other rod-shaped fastener, typically preventing axial movement along a shaft. 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. Hairpin clips, also known as R-clips, slip on with no bending. ![]() A split pin has two long prongs that are bent to hold it in place. They are common in securing wheels and machine components on an axle or shaft. It has excellent cold working (forming at room temperature) properties. Cotter pins secure other fasteners such as clevis pins or castle nuts. 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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