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As the bolt head is tightened, the cone is pulled up the bolt thread, causing the legs of the sleeve to expand until the cone locks the sleeve against the inner wall of the hollow section.available in two versions: the original 3-part design for general hollow section connections and the larger sized 5-part high clamping force (hcf) version, for higher strength structural connections.

Security screws. we are manufacturer and exporters of security screws. these screws are used for security purposes. the head of this type of screw is impossible to reverse. it requires special tools or mechanisms like spanners, tri-wings, torxes square drivers, etc. we can make as per customers drawing or samples. features: impeccable finish

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A broken drive shaft can mean serious downtime. most automotive services shops simply aren't equipped to handle the specialized operations of pressing in new universal joints, repairing damaged yokes or rebalancing a repaired shaft. instead, they rely on driveline specialists who often have a backlog for this high-demand work.

We attach value to innovation, especially with patents of China on Electroplating black hollow bolt, its superb technology has reached the international sophisticated level, and has a high reputation within the Electroplating black hollow bolt industry. Our group not only has excellent researchers and business nationwide sales and service network, but additionally are China shoppers specified brand companies.


Providing best high-quality Electroplating black hollow bolt products,we're professional manufacturer in China.Wining many of the significant certifications of its business,our Electroplating black hollow bolt items are most effective sellers in the nearby and international market place. When you want more information about our factory and product list,please click the button bellow to verify for it.

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