Side-by-side comparison of the stainless steel concrete fasteners I’ve got right now. L-to-R: Tapcon 410 SS washer-head 1/4-inch screw, 304 SS M8 wedge anchor, and two 304 SS sleeve anchors (M6 and M8). The high floor-to-near-ceiling metal book shelves have been assembled, but all of our books (except for ones we’ve needed since the relocation) […]