Button Head Hex Socket Cap Stainless Steel Sems Screws , Double Washers Metric Sems Screws

Button Head Hex Socket Cap Stainless Steel Sems Screws , Double Washers Metric Sems Screws

1. Description:

The basic Sems preassembled screw and washer was a major fastening invention that changed industry’s assembly methods. All types of washers — conical, flat, tooth, helical and many others – can be preassembled to all types of screws. Many important advantages of screw and washer assemblies have contributed to their popularity through the years:

*Eliminate small parts handling and dropped parts.

*Lower purchasing, inventory and assembly costs.

*Insure proper parts usage.
*Increase assembly, efficiency and productivity

The conventional flat washer, tooth washer or helical washer Sems meets the needs of most assembly applications. Flat Washer Sems span large holes,protect fragile surfaces and distribute load. External tooth lock washers are the preferred tooth lock washer style for preassembly as the tapered twisted teeth are on the largest radius to provide maximum torsional resistance to removal rotation. The internal tooth lock washer style is ideal when the screw head is small — such as a fillister head — and in applications where it is desirable to hide the teeth — either for appearance or to avoid snagging and scratching.

Helical washers are often used on larger diameter screws and bolts where high torques or heavy loads are involved and in hardened surface applications where confined space must be accommodated.

BUTTON HEAD HES SOCKET DRIVE SEMS SCREWS

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       Suzhou Crever Fastener Co.,Ltd.is a production enterprise combining research,manufacturing and sales together.We possess polished equipment,solid techniques and complete quality system. We have been in this line for more than 20 years, every month we can ship more than 20 containers to the world market.

　　We can provide you with products according to GB,JIS,ANSL,DIN,BS,ISO and other standards, we can also customize products.With advanced techniques and full specifications, our products are popular both at home and abroad.

　　With favorable prices,in-time delivery and perfect after-sales service,we enthusiastically look forward to the consultation and visit from friends both at home and abroad.