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Premium Threaded Stud Bolts &
Heavy Hex Fasteners

ISO9001-Certified Manufacturer of Industrial Bolts, Nuts, and Threaded Rods. High-strength, corrosion-resistant fasteners for oil & gas, construction, and heavy machinery.

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Who We Are

Shanghai Powermax Fastener Co., Ltd. has been a trusted manufacturer and exporter of industrial fasteners since 2008.

Established Excellence

Located in Shanghai, China, our factory specializes in high-tensile threaded stud bolts, heavy hex bolts, fully threaded rods, and specialty fasteners for global markets.

With over 15 years of export experience, our products are best-selling across Europe, the United States, the Middle East, and Southeast Asia.

We serve industries including oil & gas, power generation, construction, petrochemical, and heavy machinery.

DIN608 Grade 8.8 Bolts High Strength Hex Nuts

Our Premium Products

Engineered for strength, durability, and precision. All products meet ASTM, DIN, SAE, and ISO standards.

DIN608 Grade 8.8 High Strength Bolts

DIN608 Grade 8.8 High Strength Bolts

  • Material: Carbon Steel
  • Diameter: M12
  • Surface: Black Finish
  • Standard: DIN608
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High Strength Tempered Steel Hex Nuts

High Strength HDG Hex Nuts A563 Grade C

  • Material: Tempered Steel
  • Size: 3/4 Inch
  • Finish: Hot Dip Galvanized
  • Standard: A563 Grade C
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Super Duplex Stainless Steel All Thread Rod

Super Duplex All Thread Rod ASTM A182 F55

  • Material: S32760 Super Duplex
  • Standard: ASTM A182 F55
  • Diameter: 20mm
  • Application: High Pressure Pipe Lines
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Grade 10.9 Square Neck Carriage Bolt

Grade 10.9 Square Neck Carriage Bolt

  • Grade: 10.9
  • Standard: SAE J429
  • Finish: Black Alloy Steel
  • Size: M8
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SAE J429 Grade 2 Threaded Rod

SAE J429 Grade 2 Threaded Rod

  • Standard: SAE J429
  • Grade: 2
  • Diameter: M6
  • Finish: Black
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ASME Flat Square Head Bolt

ASME Flat Square Head Bolt

  • Standard: ASME
  • Head Type: Flat Square
  • Material: Carbon Steel
  • Finish: Zinc Plated
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ASTM A193 B7 Heavy Hex Head Bolts

ASTM A193 B7 Heavy Hex Head Bolts

  • Material: 4140 Steel
  • Grade: B7
  • Diameter: 1/2"
  • Thread: UNC
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M12 UNC DIN6921 Serrated Flange Bolt

M12 UNC DIN6921 Serrated Flange Bolt

  • Standard: DIN6921
  • Grade: 8.8
  • Diameter: M12-1.75
  • Surface: Galvanized, ZP
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Quality Control & Certification

Shanghai Powermax Fastener Co., Ltd. carries out production and quality management in strict accordance with ISO9001:2008 standards.

  • Raw material inspection and traceability
  • In-process dimensional and mechanical testing
  • Final product inspection and certification
  • Full test reports available (MTR, PMI, etc.)
  • Compliance with ASTM, DIN, ISO, SAE, and JIS standards
Quality Inspection Finished Product Testing
15+
Years Experience
158+
Product Types
50+
Countries Served
ISO
9001 Certified

Frequently Asked Questions

What materials do you offer for threaded stud bolts?

We manufacture threaded stud bolts in carbon steel (Grade 2, 5, 8), alloy steel (A193 B7, B16), and stainless steel (304, 316, 321, F51, F53, F55). Special alloys like Alloy 286 and 4340 are also available.

What standards do your products comply with?

Our fasteners meet ASTM, DIN, ISO, SAE, JIS, and GB standards. Common specifications include ASTM A193, A320, A194, A325, A563, DIN931, DIN933, DIN6921, and ISO 4014/4017.

Do you provide custom manufacturing?

Yes, we offer OEM and ODM services. We can produce custom sizes, threads (UNC, UNF, metric), lengths, and finishes according to your drawings and specifications.

What surface treatments are available?

We offer black oxide, plain, zinc plating (clear, blue, yellow, black), hot dip galvanizing, Dacromet, Xylan 1424 coating, and mechanical plating based on application requirements.

Contact Us

For quotes, technical inquiries, or custom orders, please visit our official website to get in touch with our sales team.

Visit Official Website

Email: frank@fastenerhome.com.cn

Address: #888 Xingrong Road, Jiading District, Shanghai, China

Worktime: 9:00-17:00 (Beijing Time)

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