Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer
Product Specifications
- Size
- Length
Contact Supplier
Product Highlights
- Wide Size Range: Available in sizes from M6 to M100 and 1/4' to 4' to meet diverse project needs.
- Customization Available: Customization from samples is supported to match specific client requirements.
- Multiple Certifications: Products are certified by API, CE, TUV, and ISO for quality assurance.
- Diverse Material Options: Offers ASTM A193, A453, A320, and A182 grades including duplex and super duplex.
- Corrosion Resistant Coatings: Coatings include Zinc, PTFE, Xylan, Cadmium, and Hot dip galvanizing.
- Flexible Payment Terms: Accepts LC, T/T, D/P, PayPal, Western Union, and small-amount payments.
- Global Shipping Options: Shipping via FOB, CIF, CFR, and EXW from Xiamen Port.
- Low MOQ: Minimum Order Quantity is 1, suitable for small projects and samples.
Product Attributes
- Customization
- Available
- Material
- Carbon Steel
- Type
- Round Head
- Model NO.
- SBN-005
- Connection
- Common Bolt
- Head Style
- Round
- Standard
- DIN, ANSI, GB, JIS, BSW, ASME, ISO, Hg
- Grade
- 12.9
- Application
- Machinery, Chemical Industry, Environmental, Building, B16.5 Flanges Connection
- Finish
- Color-Zinc Plated
- Surface Treatment
- Bichromated Zinc Coating
- Delivery
- 2-4 Weeks
- Thread
- Full Thread, Unc, Unf
- Length
- According to Client's Requirement
- Size Range
- 5/16"-4", 1/4"- 4"Length
- Transport Package
- Plywood Cases/Wooden Boxes
- Specification
- 2-1/2" x 480mm
- Trademark
- Qishine, QS
- Origin
- China
- HS Code
- 7318159090
- Package Size
- 50.00cm * 12.00cm * 12.00cm
- Package Gross Weight
- 20.000kg
- Lead Time
-
30 days (1 - 200 Pieces)
To be negotiated ( > 200 Pieces)
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer
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Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer -
Hardware Screw Bichromated Zinc B7 Bolt with Heavy Hex Nut China Manufacturer
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Product Description
ABOUT US
Xiamen Qishine Industry Co., Ltd. is a Chinese company established in 2013. We are a leading fabrication services provider in industries such as Oil & Gas, Petroleum, Marine, Oilfield, Mining, and Heavy Industry, specifically for pipeline construction and maintenance.
Qishine is ideal choice for EPC companies and project contractors. Our company specializes in supplying a range of products including Fasteners, Flanges, Gaskets, Fittings, Valves, Pipes and Piping Spare Parts. Our products are API, CE, TUV and ISO certified. Products are widely used on oil rigs, new nuclear power plant, Chemical and Heavy Industry.
Qishine is proud as being a premium product supplier who works closely with our clients to achieve the best possible results. We have an experienced team, skilled labor force, and advanced facilities to ensure safe and efficient project completion, meeting deadlines and budget requirements.
Qishine is ideal choice for EPC companies and project contractors.
Stud Bolt and Nuts
A193 B7 Stud Bolt is a type of bolt with threads on both ends. It is designed to be screwed into a fixed part at one end and to receive a nut at the other end. In the petroleum or chemical industries, they are widely used for flange connections, and the most common combination is a stud bolt with two nuts on either side, which replaces a bolt and nut assembly.
As we know that Stud Bolts come in many different categories. The type used for flange connections is called a flange stud bolt and has a fully threaded shaft with chambered ends. The theoretical length is measured by the thread. A continuous threaded stud bolt is very similar, except it has no chambered ends.
Stud Bolt Materials
The most common materials for stud bolts (for flanges) are ASTM A193 (grade B7, B8, B8M, B8T), ASTM A453 (grade 660), ASTM A320 (grade L7, L7M), and ASTM A182 (duplex and super duplex bolting). For aggressive fluids and environments, stud bolts can be coated with Xylan/PTFE, Zinc and other materials.
ASTM A193 Stud Bolts: Chemical Composition
| Physical Element | ASTM A193 grade B7 (AISI 4140) | ASTM A193 grade B8 (AISI 304) | ASTM A193 grade B8M (AISI 316) |
|---|---|---|---|
| Carbon | 0.38 - 0.48% | 0.08% max | 0.08% max |
| Manganese | 0.75 - 1.00% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.80 - 1.10% | 18.0 - 20.0% | 16.0 - 18.0% |
| Nickel | absent | 8.0 - 11.0% | 10.0 - 14.0% |
| Molybdenum | 0.15 - 0.25% | absent | 2.00 - 3.00% |
ASTM A193 Stud Bolts: Mechanical Properties
| ASTM A193 | Size | Min Tensile Strength (KSI) | Min Yield Strength (KSI) | Min Elongation (%) | RA % min | Max HBW | Max HRC |
|---|---|---|---|---|---|---|---|
| ASTM A193 grade B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 | 321 | 35 |
| 2-5/8 - 4 | 115 | 95 | 16 | 50 | |||
| 4-1/8 - 7 | 100 | 75 | 18 | 50 | |||
| ASTM A193 grade B8 Class 1 | All | 75 | 30 | 30 | 50 | 223 | 35 |
| ASTM A193 grade B8M Class 1 | All | 75 | 30 | 30 | 50 | 223 | 96 |
| ASTM A193 grade B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 | 321 | 35 |
| 7/8 - 1 | 115 | 80 | 15 | 35 | |||
| 1-1/8 - 1-1/4 | 105 | 65 | 20 | 35 | |||
| 1-3/8 - 1-1/2 | 100 | 50 | 28 | 45 | |||
| ASTM A193 grade B8M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 | 321 | 35 |
| 7/8 - 1 | 100 | 80 | 20 | 45 | |||
| 1-1/8 - 1-1/4 | 95 | 65 | 25 | 45 | |||
| 1-3/8 - 1-1/2 | 90 | 50 | 30 | 45 |
The material chosen for the threaded stud and the hex nuts should be compatible. Materials for bolting sets shall be selected based on the process's working temperatures, as shown in the table below:
| TEMPERATURE °C ( °F ) | ||
| STUD BOLTS MATERIALS | MIN. | MAX. |
| CARBON STEEL | -29 (-20) | 300 (572) |
| A193 B7, L7 | -73 (-100) | 400 (752) |
| A193 B6 | 0 (32) | 500 (932) |
| A193 B8 | -200 (-325) | 575 (1067) |
| A193 B16 | 0 (32) | 520 (968) |
| A193 B17B | -29 (-20) | 650 (1202) |
| A913 Inconel 718 | 0 (32) | 750 (1382) |
| A453 Gr. 660 | -29 (20) | 538 (1000) |
ASTM A453 Stud Bolts for High-Temp. Service
ASTM A320 Stud Bolts for Low-Temp. Service
Stud Bolts' Coating
Stud bolts can be coated to increase the resistance to corrosion. The most common types of coatings for stud bolts are listed below:
- Electro zinc plating
- Electro cadmium plating
- Hot dip galvanizing
- PTFE Coating
- Phosphate coating
- Electroless nickel plating
- Zinc-nickel coating
- Aluminum coating
- Silver coating
- Zinc/Nickel by electrodeposition
- Xylan coating
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASR247255". Items marked "
" are certified.
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Company Profile
We Xiamen Qishine Industry Co., Ltd. is dedicated to supplying extensive range of Pipe, Valve, Flange, Pipe Fitting, Fastener, Gasket and related spare parts for oil, gas, petroleum industry service. And we offer Solar Power Supply System, such as Photovoltaic Panel in New Energy Field. Qishine. En. Made-in-China. com is our homepage, you are welcome to login for more details.
All Qishine's products are manufactured by ISO, API, CE/PED and EU approved factories. Professional production, scientific management and good workforce, making our products are popular in Europe, American, Middle East, Asia and Africa. Our products are 100% inspected before packing with qualification EN10204- 3.1 certificates. And any third party inspection before delivery are welcome.
Our advantages:
One-stop shop service, save time and cost for clients. Best choice for EPC companies and projects' construction.
Good quality goods.
Rich experience in exporting and projects service.
Competitive price.
Professional service.
Choose Qishine means you stand with reliability, high quality & Competitiveness!
The future of Qishine begins today, and it is focused on being the preferred supplier of steel pipeline materials. For this, it must be differentiated by offering maximum quality goods, giving the best service, with the best possible competitiveness, and this is what we work on continually.
Good quality + competitive price + professional service = Long-term win-win cooperation. Please give both of us the nice opportunity to work together. I believe it will be a great start. Expecting your nice enquiry and to be your long-term strategy partner soon.
Thank you for your support!
About Our Factory & Business Background
- Address
- 318 Houhang Qianshe, Huli District, Xiamen, Fujian, China
-
Registered Capital
- 10,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: one month -
Nearest Port
- Xiamen Port
-
Minimum Order Quantity
- 1
-
Supply Chain Partners
- 6
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2013-11-18
-
Export Year
- 11 Years
-
Main Markets
- North America, South America, Europe
-
Repeat Buyers Choice
- 30%~50%
-
Number of Foreign Trading Staff
- 4
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015
FAQ
- What materials are available for stud bolts?
- We offer ASTM A193 (B7, B8, B8M, B8T), ASTM A453 (660), ASTM A320 (L7, L7M), and ASTM A182 (duplex/super duplex).
- Can the length of the bolt be customized?
- Yes, the length is fully customizable according to the client's specific requirements.
- What coating options are available for corrosion resistance?
- Options include electro zinc plating, hot dip galvanizing, PTFE, Xylan, phosphate, and aluminum coatings.
- What is the minimum order quantity?
- The minimum order quantity is 1, allowing for flexible purchasing.
- Do you offer OEM services?
- Yes, we provide OEM services and can customize products based on client samples.
- What are the payment terms?
- We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payments.
- What is the delivery time?
- Standard delivery takes 2-4 weeks. Peak and off-peak season lead times are approximately one month.
- Are your products certified?
- Yes, our products are certified by API, CE, TUV, and ISO standards.
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