3/8″-16 x 4″ Plain Grade 5 Steel Left Hand Thread Hex Cap Screws (2 pcs.)
Diameter: 3/8″ Length: 4″ Material: Steel Finish: Plain Head Style: Hex (9/16″ Wrench) Thread Size: 16 (Left Hand|Coarse) Thread Length: 1″ to 2″ Hardness: Grade 5 Style: Left Hand Type: Cap Screw Box of 2. A hex cap screw has a hexagonal head, designed to be driven by a wrench.