Jinjiang Tagong Hardware Forging Manufacturer Co. LTD,
Expertly specializing in the crafting of superior-grade nuts, our journey began in 1985,
Our esteemed array of standard nuts encompasses a full spectrum including (GB/DIN/ISO/UNI/JIS/GOST/ANSI/ASTM), each precision-engineered to guarantee outstanding quality and flawless compatibility;
Additionally, our exclusive range of specialty nuts (featuring slotted nuts, nylon insert nuts, flange nuts, self-locking nuts, square nuts, cap nuts, and beyond) is thoughtfully crafted to address a multitude of requirements and applications with excellence.
Standard: Our fasteners adhere to the rigorous DIN912 Hex Socket Head Cap Screws standard, ensuring reliability and precision for your industrial needs.
Grade: Available in grades 4.8, 6.8, 8.8, 10.9, and 12.9, offering a spectrum of strength and durability options to match your specific application requirements.
Size: These fasteners come in a versatile range of sizes from M12 to M36, providing the perfect fit for various engineering and construction projects.
Surface treatment: Choose from a variety of finishes including black, zinc plated, zinc (yellow) plated, H.D.G., Dacroment, and more to enhance protection and aesthetics.
Material: Crafted from premium carbon steel, alloy steel, and stainless steel, ensuring longevity and performance in demanding environments.
Packing: Conveniently packed at 25kgs per box, with 36 boxes per pallet, totaling 900kgs per pallet, designed for easy handling and transport.
Sample: We offer complimentary samples to help you assess the quality and suitability of our fasteners for your projects.
DIN912 Hex Socket Head Cap Bolts with Yellow Zinc |
(Samples with surface treatment of Plain+oil for optimal test results and performance assurance, ensuring that our fasteners meet your highest expectations.)

Materials and surface treatments can be fully tailored as follows: Customize materials and finishes to perfectly align with your unique project specifications and needs.
Mechnical Property |
Material |
Surface Treatment |
Class 6 / 8/ 10 /12 |
C45
40Cr
35CrMo
42CrMo
|
♦Yellow Zinc
♦Zinc Plated
♦Black Oxide
♦Phosphate
♦Dacromet
♦Geomet |
Packing way:25kg/carton, supporting 1.5tons-2.5tons per pallet; customizable to meet any buyer's specifications for efficient storage and transportation solutions.
For further assistance and detailed inquiries, please feel free to contact us. Our expert team is ready to provide guidance and answer all your queries.
DIN6923 |
Thread Size |
c min |
da |
dwmin |
e min |
h |
m min |
mw min |
s |
M18 |
2.4 |
16-17.3 |
34.5 |
31.9 |
26.75-16 |
15.3 |
9 |
24-23.67 |
M20 |
3 |
20-21.6 |
42.8 |
39.9 |
32.95-20 |
18.9 |
11.1 |
30-29.67 |
P.S.: Due to fluctuations in material costs, kindly reach out for an accurate quote before placing an order. This ensures you receive the best pricing and manage your budget effectively.
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If you have a custom design, please do not hesitate to contact us. We are eager to collaborate on tailored solutions that meet your exact specifications.
WHOWE ARE
With a rich legacy dating back over 38 illustrious years, Jinjiang Tagong Hardware Forging Manufacturer Co. Ltd. shines brightly as a beacon of excellence in the fastener industry. Celebrated for its steadfast dedication to unparalleled quality and profound expertise, the company consistently delivers both standard and bespoke solutions, flawlessly meeting a wide array of needs with precision.
Established in 1985, our cutting-edge manufacturing facility spans an impressive 60,000 square meters. Nestled in the dynamic heart of Jinjiang City, this strategic location significantly boosts our operational efficiency and capabilities.
Our expertise is rooted in the artful blend of state-of-the-art forging techniques with precision machining. Our adept production management team, alongside a highly competent technical R&D department, excels in creating uniquely customized fasteners that flawlessly align with the specific requirements and visions of our esteemed clients.
Our products epitomize supreme quality and steadfast reliability, having withstood rigorous testing and achieved certifications that meet ISO9001/2015, GB/T19001-2016, and SGS standards, ensuring unmatched excellence in every piece.
Fueled by an unwavering dedication to quality, we have carved out a reputation as a trusted global supplier. Our products are not only celebrated but are also widely embraced across various continents, including Europe, Australia, North America, South Asia, and beyond, significantly amplifying our international footprint.
Development History
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