Product Guides

How to Identify High-Tensile Bolts: Grade Markings Decoded

Read bolt head markings, decode ISO 898-1 metric property classes (4.6, 8.8, 10.9, 12.9) and SAE J429 imperial grades, check AS/NZS 1252.1 structural bolts, and avoid counterfeits. Practical Australian guide with selection tables.