Hard-to-Find Fastener 014973161590 Hex Concrete Screws, 3/16 x 4-Inch, 10-Piece Diameter: 3/16 inch Length: 4 inches Material: Steel Finish: Blue ruspert Head Style: Hex washer (Hex) Diameter: 3/16" Length: 4 inches Material: Steel Finish: Blue Ruspert Head Style: Hex Washer (Hex)