Factory made hot-sale Stainless Steel Square U-Bolts - Hollow Wall Anchors – Sunshow Detail:
It is a kind of expansion bolt. It uses an expansion clip to grip the walls of embedment holes while the nut is tightened at the top. The collar expands and “wedges” itself against the material wall and shank of the bolt, successfully holding the fixture in place.
Product detail pictures:

Related Product Guide:
Our concentrate on should be to consolidate and enhance the quality and service of present products, meanwhile consistently produce new products to meet unique customers' demands for Factory made hot-sale Stainless Steel Square U-Bolts - Hollow Wall Anchors – Sunshow, The product will supply to all over the world, such as: Spain, Lyon, Argentina, Since the establishment of our company, we've realized the importance of providing good quality goods and the best before-sales and after-sales services. Most problems between global suppliers and clients are due to poor communication. Culturally, suppliers can be reluctant to question points they do not understand. We break down these barriers to ensure you get what you want to the level you expect, when you want it.

This is a very professional and honest Chinese supplier, from now on we fell in love with the Chinese manufacturing.

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