The CM M451 Midland trawling shackle is made of carbon steel, measures 5/8" in diameter, has a capacity of 9,000 lb., and can be used in rigging. Carbon steel is resistant to impacts and wear.
Shackles are used to connect two items together such as chains, ropes, or wires. A shackle is made up of a U-shaped piece of metal called a bow, and a bolt or pin to secure the ends of the bow together. The bolt or pin is removed to connect or disconnect the chains, ropes, or wires. Shackles are commonly used in boating, shipping, construction, entertainment, and manufacturing applications to create rigging systems that tie down, tow, lift, or suspend. They come in a variety of sizes and strengths to handle loads weighing from a few pounds to hundreds of tons. They are often galvanized or tempered for durability and corrosion resistance, which is especially important for shackles used for long periods under adverse conditions such as salt water, sea air, or extreme temperatures. Shackles come with either pins or bolts to handle widely varying load and lift requirements. Round pins and screw pins are used for static loads in temporary rigging systems. Bolts are used when a load will slide around, or for long-term and permanent rigging systems in structures such as cranes, offshore oil platforms, catwalks, and theaters or production studios.
Columbus McKinnon manufactures hoists, actuators, cranes, and other material handling products. The company, founded in 1875, is headquartered in Amherst, NY.