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From Wikipedia, the free encyclopedia
A captive fasteners is an engineered fastener designed for a permanent hold within a target assembly or housing, including upon servicing. They provide a secure joining, and avoid fastener loss or damage that might be caused by a loose part.
A captive fastener is sometimes made with thread locking, press-fitting, or broaching to accomplish an anchor-hold within a larger assembly housing. However, a captive fastener may also be melded with the material into which it is joined, either through cold forming or welding.[1][2]
Captive screws are a type of machine screw which are frequently used for safety reasons, often with a captive washer. They are now required by EU law on equipment such as safety guards so that machinery complies with EU Machine Safety Directive 2006/42/EC.
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