| Screw
and Washer Assemblies
The basic preassebled
screw and washer assembly, commonly called "SEMS", is another
of the major fastening inventions introduced by ITW Shakeproof
that changed the industry's assembly methods. All types of washers
- conical, flat, tooth, helical and many others - can be preassembled
to all types of screws. The many important advantages of screw
and washer assemblies have contributed to their popularity through
the years:
- Eliminate
small parts handling and dropped parts.
- Insure
proper parts usage.
- Lower purchasing,
inventory and assembly costs.
- Increase
assembly efficiency and productivity.
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