Din Standard Hex Head Bolts

1. Services after product purchase:

These high-strength DIN standard hex head bolts are used in daily industrial and construction work, and our after-sales service is designed to support your normal operations.

Once your order arrives, we will check in to make sure everything is okay. If any items are missing or the packaging is damaged, contact our service team and we will fix the problem right away. You won’t need to go through difficult procedures.

We provide simple usage guides for your team. If you have questions about installing or using the parts, you can call or email us. Our team will give you clear answers without long waiting times.

For quality problems covered by the warranty, send us photos and basic information. We will look into each case fairly and arrange solutions such as replacements.

We keep records of your past orders. When you place a repeat order, just send your order number and we will handle it more quickly. This can make your business work smoother.

2.Product strength grade

These Din Standard Hex Head Bolts have simple strength ratings based on European mechanical standards. We don’t add any extra descriptions to the numbers. The most widely used carbon steel grade is 4.8, made from low carbon steel. It works for light tasks such as basic frames and regular fixtures, with tensile strength around 400MPa. Grade 8.8 uses medium carbon steel with heat treatment, suitable for common machinery and pipe connections, with tensile strength up to 800MPa. Grade 10.9 is alloy steel, made for vehicle parts and building structures that hold heavy weight consistently. The strongest standard grade is 12.9, also alloy steel, used for industrial equipment under constant stress, with tensile strength over 1200MPa. Stainless steel types use marks like A2-50, A2-70 and A4-70. They focus more on rust resistance than tensile strength, good for outdoor and chemical-exposed work. Each grade is clearly marked on the bolt head, so people can choose the right one easily. We don’t make any performance claims outside the tested data.

3、Q&A session

What surface treatments are available for this Din Standard Hex Head Bolts?

We offer three practical surface treatments: electro-galvanizing, hot-dip galvanizing and black oxide. Electro-galvanizing is suitable for indoor dry environments; hot-dip galvanizing has better anti-rust performance for outdoor and humid scenes; black oxide is a cost-effective option for general indoor use. All treatments will not damage the thread structure and ensure normal installation.