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safety wire

A wire made of galvanized low-carbon, or annealed stainless, steel or brass that is used to secure bolts, pins, clips, and other fasteners so that they will not vibrate loose in operation. Also called locking wire or lockwire.
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"Buy American has emerged into an extensive resource for copper, stainless steel, safety lockwire, welding and high temperature wires because of the company's ability to accommodate virtually any industry utilizing such products in local, national and overseas markets," said Howard in a press release issued Monday morning.
Lockwire was eliminated, and torque wrenches were no longer required for "B" nut installations.