Simpson 1 4" x 3" 316 Stainless Steel Titen HD Screw Anchor Strong Bolt 2 Wedge Anchor Hybrid face mount and top mount design Hybrid face mount and top mount design combines the strengths of both hanger types in one connector The 10x20mm parallel shank with driving flat is a widely used industrial standard Type 316 Stainless Steel Heavy Duty Screw Anchor is a premium concrete and masonry anchoring solution engineered to deliver fast Simplified installation with no specialty tooling the combination of standard ANSI tolerance drill bit compatibility and a hex washer head that eliminates the need for a separate washer means fewer components to manage and a faster path from hole to finished anchor on the job site