Blue Concrete Self Tapping Undercut Bolt Hex Head Screws, Under Cutting End, Zinc Plated, More Stronger For Concrete, Grade Can Be 4.8/5.8/6.8/8.8/10.9/12.9 Etc.

GUSEN concrete screw bolt anchors are high strength concrete and masonry screw anchors with helical threads allowing the bolt to cut it's own thread in concrete and masonry when tightened,serious styles available:

Flange hex head bolts, CSK bugle head bolts, self tapping undercut, also, heat dip galvanized coating, zinc plated, yellow and white color surface.

HDG concrete bolt anchor is low cost and high effective anchoring solution for internal and external bolting and fixing of construction.

The grade can be 4.8,8.8,10.9,12.9, meanwhile the materials can be metal, stainless steel, SS 304,SS316.

Concrete  screw bolt anchors are very effective, heavy duty, economical method of fastening directly into masonry , cracked concrete, non-cracked concrete.

As a kind of expansion anchor bolt, the concrete bolt with setting depths and adjustability , won good reputation and great variety of application in the fasteners and fixing working areas.