Members of the Feminist Studio Workshop of 1978-79 also made 500 of these necklaces to celebrate the 5th anniversary of the Woman's Building in Los Angeles. Since then she has given them to other women with whom she shares a vision of the creation of women's culture. They allow a rope to be threaded into the loop, even if its ends are already attached elsewhere.įeminist artist Sheila Levrant de Bretteville designed a necklace of an eye bolt on a chain, meant to represent "strength without a fist" she gave the first of these to Arlene Raven and Judy Chicago when they started the Feminist Studio Workshop in 1972. 'Pigtail' eye bolts are a form of bent loop where the ends are not closed, but multiple turns are used to prevent a rope slipping out. For high loads, eye bolts with forged or welded loops should be chosen, as they can withstand loads up to the tensile strength of the material of which they are made. Like wire eye bolts, wire eye lags are intended for light duty applications and should not be used for angular loads.Įye bolts made by bending a rod or wire into a loop are only suitable for light duty applications, as heavy loads can cause the eye to open. Wire eye lags (also called screw thread eye bolts, eye screws, or turned/bent eye lags) have a wood screw thread for use in wood or lag anchors. Long-shanked screw eyes are termed 'vine eyes' and are used to attach support wires to wooden fence posts when growing soft fruit or grape vines, the plants then being tied to the wires. Screw eyes are commonly used to attach cables to objects, for instance attaching a string to the back of a painting to allow the painting to hang from a nail on a wall. Screw eyes are a screw with a loop on one end and threads on the other end. The loose ring is articulated, such that it can rotate in at least one axis, and can thus reduce bending forces on the bolt when loaded and will present the minimum obstruction when "flat". Some lightweight forms are not screwed, but rely on just the pull on the ring itself to expand the anchor.Ī ring bolt is an eye bolt with a captive ring passing through it.
Most of these screw into some form of shield anchor. Heavy forged eye bolts with a continuous eye may be forged with an integral shoulder, allowing their use for heavy off-axis loads.Įye bolts are often installed into masonry and so versions that form their own anchor bolt are commonly available.
Eye bolts without a shoulder should not be used for angular loads. Machinery eye bolts are fully threaded and may have a collar, making them suitable for use with angular loads up to 45°.
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