Applications: the anchor is made of 316 stainless steel. This anchor is designed for use in concrete only, and should never be used in block or brick base material. Environment: the dowel is designed for use in a submerged/chemical environment. Hole diameter/bit diameter. The anchor requires a 1/4 inch hole in the base material to be drilled (concrete only). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill. Diameter of anchor. The diameter of the anchor is 1/4 inch. Anchor length: the length of the anchor is 3-1/4 inch thread length. The length of the threads on the anchor is 2-1/8 inch in length. Minimum embedment: the minimum anchor embedding in the concrete is 1-1/8 inches. Therefore, the anchor must be installed, so that a minimum of 1-1/8 inch of the dowel is embedded in the concrete. Maximum Fixture Thickness The maximum thickness of the attachment part or the maximum thickness of the material is attached for an anchor is 1-7 / 8 inches. This ensures that the minimum embedding of 1-1/8 inches are met. Fixture hole diameter of the hole in the device or material must be larger than the designated diameter of the anchor. The 1/4 inch diameter anchor requires the hole in the holder to be 5/16 inch. 10 ft./lbs - torque value. To be set properly in the concrete, the anchor must be tightened between 5. The distance between the anchors. Each dowel must be a minimum distance of 2-1/2 inches apart from each other when measured centre to centre. Edge spacing. It is very important not to install the anchor closer than 1-1/4 inch from an unsupported edge of the concrete.