MECHANICAL ASSEMBLY
MECHANICAL ASSEMBLY
MECHANICAL ASSEMBLY
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Screw Thread InsertsInternally threaded plugs or wire coils designed to beinserted into an unthreaded hole and accept anexternally threaded fastener•Assembled into weaker materials to provide strongthreads•Upon assembly of screw into insert, insert barrelexpands into hole to secure the assembly©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”