Simpson CD25212M 1/4" X 2-1/2" Mushroom Head Crimp Anchor - Zinc, Pkg 100 Hex Head 410 Stainless Steel Concrete Screws Its gripping section holds the

Its gripping section holds the bolt without a nut

Masonry and Concrete Applications: Can be installed with Titen HD screws for secure attachment to CMU or concrete walls

These screws meet the requirement of the tile roofing institue as described in ESR-2015P

Racking systems and equipment anchoring

Type 17 point - drives quickly into material and minimizes splitting

Simpson CD25212M 1/4" X 2-1/2" Mushroom Head Crimp Anchor - Zinc, Pkg 100 Hex Head 410 Stainless Steel Concrete Screws Its gripping section holds theThe Simpson Strong Tie Crimp Drive anchor is an easy to install expansion anchor for use in concrete and grout filled block. The pre formed curvature along the shaft creates an expansion mechanism that secures the anchor in place and eliminates the need for a secondary tightening procedure. This speeds up anchor installation and reduces the overall cost. The low profile mushroom head works excellent for attaching wood or light gauge steel to concrete