Product Specification Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key). System of Measurement : Metric Thread Diameter : 6mm Thread Size 1mm Head Diameter : 10mm Head Height : 6mm Screw Length : 20mm (Head Not Included) Allen Hex Drive : 5mm Material : Alloy Steel Grade 12.9 Finish : Black Oxide Package Included 20pcs x Socket Head Cap Bolts/Screws with 1pcs x Hex Spanner, Warranty SUZLFTDZSW hardware as your direct manufacturer of fasteners, we deliver top-tier screws at the most competitive prices. Count on us for quality and value.Buy with confidence. Money back or exchange guarranteed.