Although there is no reason to consider this definition obsolete, because it is far from clear that "a bolt by definition takes a nut" . Using a coach "bolt" as an example (and it has been a 'bolt' for a very long time). It was not originally intended to receive a nut, but did have a shank. Its purpose was not to pass through the entire substrate but only one piece of it, while the threaded portion bit into the other in order to draw, and clamp the materials together. The 'carriage' bolt was derived from this and was employed more to speed up manufacturing than achieve a different function. The carriage bolt passes through both pieces of materials and employs a nut to provide the clamping force. Both are still, however, bolts.
Bolt type shackles can be used in applications where round pin or screw pin shackles are used. However, a bolt type shackle is a better choice in permanent or long-term applications, or if there’s a risk of a load sliding on the shackle pin, causing it to rotate. The added safety measure from bolt/nut/cotter pin is the reason these shackles are also called safety anchor shackles.
Our galvanized bolt type / safety anchor shackles feature a zinc oxide coating for protection against rust and corrosion. A galvanized coating also gives the steels a more durable finish that’s more difficult to scratch and ding. Galvanized bolt type anchor shackles are also more cost effective than a stainless steel bolt type anchor shackle.
We offer 1/2" galvanized bolt type shackles up to 2 ½". As with every shackle, bolt type shackles have the size and working load limit permanently embossed for quick and easy identification.
Not sure which bolt type anchor shackles are right for your application or need a custom order? Call 800-404-7068 to talk to one of our product experts.