Shackles are manufactured in a wide variety of types, styles, sizes, and fabrications, and with so many different options available, choosing the right shackle for the job can be confusing.
We`ve outlined some of the basic differences between the most common types of shackles.
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Anchor shackle/bow shackle vs.chain shackle/D-shackle
Anchor shackle
Bow shackles and anchor shackles are terms that are often used interchangeably, as both names refer to a shackle with a larger, rounded [O" shape look. However, a bow shackle typically has a larger, more defined bow area than an anchor shackle. The rounded design of anchor shackles and bow shackles allow them to take loads from many directions without developing significant side load. The larger loop shape of an anchor shackle or bow shackle does reduce its overall strength, but it is also able to handle a larger strap.
Chain shackle
Chain shackles are also known as D-shackles. Both refer to the [D" shape design. A d-shackle is narrower than a bow or anchor shackle and generally have a threaded pin or pin close. The smaller loop is designed to take high loads primarily in line. Side and racking loads may twist or bend a D or chain shackle.
Both types of shackles are generally always available in galvanized metal and stainless steel, and all come with different pin options as well.