20mm-2.5 x 180mm Black Phosphate Class 10.9 Hex Cap Screws (5 pcs.)
Diameter: 20mm Length: 180mm Material: Steel Finish: Black Phosphate Head Style: Hex (#30 Wrench) Thread Size: 2.5mm (Coarse) Thread Length: 52mm Hardness: Class 10.9 Type: Cap Screw Specifications: DIN 931 Box of 5. A hex cap screw has a hexagonal head, designed to be driven by a wrench.