Grade 12.9 High Strength Heavy Hex Structural Bolt for Steel Structure Connections

Yes. Our DIN933 hex bolts are manufactured according to DIN933 standards with strict quality control to ensure accurate dimensions, precise threads and reliable fastening performance. Quality inspection includes: Dimension inspection Thread accuracy testing Hardness testing Tensile strength testing Surface treatment inspection Our DIN933 hex bolts are widely used in machinery, construction, equipment assembly and industrial fastening applications.

DIN933 hex bolts are full thread bolts, while DIN931 bolts are partial thread bolts. DIN933 bolts provide thread along the full length of the shank, making them suitable for applications requiring flexible tightening positions and full-thread engagement. Main advantages of DIN933 include: Full thread design Flexible fastening depth Easy installation with nuts or threaded holes Suitable for mechanical assembly Commonly used for general industrial fastening Customers can choose DIN933 or

We can provide different strength grades according to customer requirements and application conditions. Available grades include: Grade 4.8 Grade 8.8 Grade 10.9 Grade 12.9 Stainless Steel A2 / A4 For general mechanical assembly, Grade 8.8 is commonly used. For heavy-duty or high-load applications, Grade 10.9 or 12.9 can be recommended.

We provide multiple surface treatments to improve corrosion resistance, appearance and service life according to different working environments. Available surface treatments include: Zinc Plated Hot Dip Galvanized Black Oxide Nickel Plated Plain Finish Dacromet / Geomet Coating Customized Anti-Corrosion Coatings For outdoor, humid or high-corrosion environments, galvanized, hot dip galvanized or stainless steel options are commonly recommended.

Yes. We support OEM and customized production according to customer drawings, samples and technical specifications. Customization options include: Different diameters and lengths Different strength grades Material customization Surface treatment customization Head marking or logo customization Customized packaging We provide stable production capacity and reliable supply solutions for distributors, wholesalers and industrial customers worldwide.