QBH high-strength large hex head bolts are specifically engineered for structural steel connections. Available in property classes 8.8S and 10.9S, these bolts feature a durable black oxide finish. To ensure optimal performance and accurate torque application, they are supplied as a complete assembly with matching heavy hex nuts and hardened washers.
QBH high-strength large hex head bolts are specifically engineered for structural steel connections. Available in property classes 8.8S and 10.9S, these bolts feature a durable black oxide finish. To ensure optimal performance and accurate torque application, they are supplied as a complete assembly with matching heavy hex nuts and hardened washers.
|
Place of Origin |
CHINA |
|
Standard |
GB/T 1228-2006 |
|
HS CODE |
7318159001 |
|
Brand Name |
QBH |
|
Certification |
ISO9001 |
|
Material |
Carbon Steel / Alloy Steel |
|
Size |
M12–M30,available upon request |
|
Production Process |
Cutting, Threading, Bending, Inspection and Packaging. |
|
Grade |
Grade C |
|
Delivery Time |
Within 30Days |
GB/T 1228 high strength large hex head bolts are manufactured from carbon steel or alloy steel according to the applicable technical requirements. Available property classes include 8.8S and 10.9S, offering different strength levels for structural steel connections. Material selection and mechanical properties are controlled according to the applicable product specifications.
|
Parameter |
Specification |
|
Product Standard |
GB/T 1228-2006 |
|
Material |
Carbon Steel / Alloy Steel |
|
Property Classes |
8.8S / 10.9S |
|
Tensile Strength (8.8S) |
830–1030 MPa |
|
Yield Strength (8.8S) |
Min. 660 MPa |
|
Tensile Strength (10.9S) |
1040–1240 MPa |
|
Yield Strength (10.9S) |
Min. 940 MPa |
|
Surface Finish |
Black Oxide |
|
Assembly |
High Strength Bolt + Nut + Washer |
GB/T 1228-2006 high strength large hex head bolts are available in metric thread sizes from M12 to M30. Different bolt lengths are supplied to meet the requirements of structural steel connections. Matching high strength nuts and washers are available as complete bolting assemblies according to the applicable specifications.
|
Parameter |
Specification |
|
Standard |
GB/T 1228-2006 |
|
Thread Diameter |
M12, M16, M20, M22, M24, M27, M30 |
|
Thread Type |
Metric Coarse Thread |
|
Thread Tolerance |
6g |
|
Bolt Length |
According to standard length series |
|
Thread Length |
Short Thread |
|
Property Classes |
8.8S / 10.9S |
|
Nut Standard |
GB/T 1229-2006 |
|
Washer Standard |
GB/T 1230-2006 |
|
Assembly |
Bolt + Nut + Washer |
GB/T 1228 high strength large hex head bolts are commonly used in friction-type bolted connections for structural steel engineering. They provide fastening solutions for steel components in construction, infrastructure and industrial projects where high-strength bolting assemblies are required.
Typical Applications:
Railway and highway bridges.
Industrial buildings and steel structures.
High-rise steel buildings.
Tower and mast structures.
Boiler steel structures.
Lifting machinery.
Infrastructure and civil engineering projects.
Bolt grades, dimensions, matching nuts and washers should be selected according to structural design requirements and applicable technical specifications.
|
Place of Origin |
CHINA |
|
Standard |
GB/T 1228-2006 |
|
HS CODE |
7318159001 |
|
Brand Name |
QBH |
|
Certification |
ISO9001 |
|
Material |
Carbon Steel / Alloy Steel |
|
Size |
M12–M30,available upon request |
|
Production Process |
Cutting, Threading, Bending, Inspection and Packaging. |
|
Grade |
Grade C |
|
Delivery Time |
Within 30Days |
GB/T 1228 high strength large hex head bolts are manufactured from carbon steel or alloy steel according to the applicable technical requirements. Available property classes include 8.8S and 10.9S, offering different strength levels for structural steel connections. Material selection and mechanical properties are controlled according to the applicable product specifications.
|
Parameter |
Specification |
|
Product Standard |
GB/T 1228-2006 |
|
Material |
Carbon Steel / Alloy Steel |
|
Property Classes |
8.8S / 10.9S |
|
Tensile Strength (8.8S) |
830–1030 MPa |
|
Yield Strength (8.8S) |
Min. 660 MPa |
|
Tensile Strength (10.9S) |
1040–1240 MPa |
|
Yield Strength (10.9S) |
Min. 940 MPa |
|
Surface Finish |
Black Oxide |
|
Assembly |
High Strength Bolt + Nut + Washer |
GB/T 1228-2006 high strength large hex head bolts are available in metric thread sizes from M12 to M30. Different bolt lengths are supplied to meet the requirements of structural steel connections. Matching high strength nuts and washers are available as complete bolting assemblies according to the applicable specifications.
|
Parameter |
Specification |
|
Standard |
GB/T 1228-2006 |
|
Thread Diameter |
M12, M16, M20, M22, M24, M27, M30 |
|
Thread Type |
Metric Coarse Thread |
|
Thread Tolerance |
6g |
|
Bolt Length |
According to standard length series |
|
Thread Length |
Short Thread |
|
Property Classes |
8.8S / 10.9S |
|
Nut Standard |
GB/T 1229-2006 |
|
Washer Standard |
GB/T 1230-2006 |
|
Assembly |
Bolt + Nut + Washer |
GB/T 1228 high strength large hex head bolts are commonly used in friction-type bolted connections for structural steel engineering. They provide fastening solutions for steel components in construction, infrastructure and industrial projects where high-strength bolting assemblies are required.
Typical Applications:
Railway and highway bridges.
Industrial buildings and steel structures.
High-rise steel buildings.
Tower and mast structures.
Boiler steel structures.
Lifting machinery.
Infrastructure and civil engineering projects.
Bolt grades, dimensions, matching nuts and washers should be selected according to structural design requirements and applicable technical specifications.
1. How do you let me trust you.
Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.
2. How about your price.
We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.
3. How do you control your quality.
Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods
4. Could you provide free samples?
For new customer, We can provide free samples for standard fastener, But the clients will pay the express
charges. For old customer, We will send you free samples and pay express charges by ourself.
5. What is your packing.
Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on the pallet,QBH company personalized packagingis also available,like 10PCS/plastic bag or 10pcs/box,it can print some information
such as LOGO and pattern of customers.
6. What is your payment term
Normally,our terms of payment are TT and L/C,if we cooperate for a long time,we can reach the point of mutual trust,and fully support our customers to become bigger and stronger in the local market.Not only in the price concessions,but also in the payment can also be made on credit,Specific credit sales time needs to be negotiated separately.

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