Four Shields heavy duty Anchor Only with four shells and the square nut inserted and fixed with the hex bolt and washer and is pulled into the anchor shells to expand it when tighening the bolt head.
It is made of carbon steel or stainless steel. Made as the Metric, Inch threads standard from diameter M6-1/4" to M20-3/4" for the special size and the style are available according to sketch and sample.
The surface could be plated by white zinc plate, yellow zinc plated, HDG or Dacromet as the customers' request.
Belongs to one kind of concrete anchor bolt They are used in the concrete or masonry place,construction building site to fix and fasten the objects safely and widely.