Pigtail eyebolts are threaded at one end for the attachment of an expansion unit. The other end is hot worked to form a pigtail eyebolt for suspension of air, water, refrigeration and ventilation columns as well as for electrical telephone cable and chain type handrails.
Rope eyebolts have a ferrule swaged to the rope at the end which is secured in the hole by the wedge. Another ferrule is swaged to the other end, onto which an eye is welded.