Partially Threaded Hexagon Head Steel Bolts, manufactured from robust 25CrMo4+QT steel with a plain surface finish. These metric-threaded bolts feature a hexagon head, ensuring reliable performance. Approved for use under the Pressure Equipment Directive (PED), and compliant with international standards including ASME B18.2.3.1M, DIN 931, ISO 4014, NEN 1555, and NF E25-122. Request a Certificate EN 10204 3.1 for added assurance in pressure vessel applications.