Description:1.Designed with hex head and carbon steel material.2.Fixing component, industrial and construction fasteners.3.Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry.Specification:Product Name: Hex Head BoltsMaterial: Carbon SteelPerformance Grade: 5 UNCThread Size: 1/4" x 1/2" (D*L)Number of Teeth: 20Rod Length: 12.5mm / 0.5"Hex Width: 11mm / 0.43"Hex Thickness:4mm / 0.16"Package Content: 20 x Hex Head Bolts