One such product that has gained traction in the aerospace industry is the clevis pin. The term "clevis pin" refers to a mechanism that is found in multiple fasteners, and this variation of fastener may be used for a variety of applications. In this article, we will discuss the design principles of clevis pins and the various applications in which they may be used.
Before diving into the various clevis fastener designs, it is first essential to review the general characteristics of all devices in this classification. Clevis fasteners may be produced in a wide variety of sizes and shapes, but all feature a distinctive pin and hole system which is used to affix the assembly to another device or anchor. The pin, which is commonly manufactured from steel, also features a slot for a tang, further enhancing the security of the system. Although they are generally more expensive than other common fastener types such as bolts, clevis fasteners provide the user with more flexibility and confidence in the final product. With a proper description in place, we will now discuss the several clevis pins which are commercially available.
Shackles are load-bearing devices commonly used in hoisting, rigging, and towing applications. These components, which are typically paired with a rope, chain, or other objects to facilitate lifting, must be securely fastened while also maintaining a quick-release ability in case of an emergency. As such, clevis shackles account for a vast majority of the total in circulation. These shackles are also preferred over bolt-type fasteners when rigging because they maintain durability and structure even if the attached rope or chain is twisted.
When it comes to marine and automotive towing, there are numerous hitching options, each with a unique design and weight-carrying capacity. If an application calls for a particularly heavy capacity, there is no better alternative to clevis hitches. Multipurpose clevis hitches are rugged attachments that are commonly compatible with lunette rings or conventional trailer balls.
Also used in towing and lifting applications, clevis hooks are devices which feature a securement pin and an open or snap-lock mechanism. These hooks are optimal for most projects because they allow for the simple attachment of ropes or chains through the U-shaped clevis section while also permitting a degree of lateral motion.
Nearly all pipe-hanging equipment consists of a support section and a steel strap. Clevis hangers help eliminate lateral motion while also allowing for vertical adjustments to be made. They may be manufactured from a variety of materials depending on the associated pipe. For example, a felt-lined hanger may be most compatible with a copper pipe since this material helps prevent the electrolysis that may occur between copper and another metal.
These specialized fasteners feature two identical opposing ends, each with a clevis mechanism. They act as an attachment point between two sections of chains or between a chain and an accessory.
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