Industrial GB923 Stainless Steel Cap Nuts (201 / 304 / 316)
At YouJia Metal, we manufacture premium stainless steel cap nuts (also known as acorn nuts or dome nuts) that strictly adhere to the GB923 standard. These fasteners are designed to provide a smooth, aesthetic finish while protecting bolt threads from corrosion and preventing accidental injury from sharp edges.
As an expert in customized processing of stainless steel non-standard parts, we leverage our 10-year manufacturing history in Dainan (China’s Stainless Steel Hub) to offer both standard GB923 nuts and fully customized fastening solutions.
Specification Thread Pitch Height (in) Across Flats (in) Thickness (in) Weight per 1000 Pcs M3 0.5 0.26 0.22 0.11 0.57 M4 0.7 0.31 0.28 0.12 1.04 M5 0.8 0.39 0.31 0.16 1.25 M6 1 0.47 0.39 0.20 2.77 M8 1.25 0.59 0.51 0.24 6.73 M10 1.5 0.71 0.67 0.31 12.88 M12 1.75 0.87 0.75 0.39 17.46 M14 2 0.98 0.87 0.43 24.66 M16 2 1.10 0.94 0.51 39.84 M18 2.5 1.26 1.06 0.59 48.78 M20 2.5 1.34 1.18 0.63 71.96 M22 2.5 1.54 1.26 0.71 102 M24 3 1.65 1.42 0.75 127.8 M27 3 1.71 1.58 0.88 227.2 M30 3.5 2.05 1.81 0.94 426 M36 4 2.28 2.17 1.38 580.9
Material Grades for Every Environment
We offer three primary material options to suit your budget and technical requirements:
201 Stainless Steel Cap Nut: A cost-effective solution for indoor, dry environments.
304 Stainless Steel Cap Nut: The industry standard for outdoor and general industrial use, providing excellent rust-proof properties.
316/316L Stainless Steel Cap Nut: Marine-grade quality, essential for saltwater rigging, chemical processing, and harsh coastal environments.
| Specification | Thread Pitch | Height (in) | Across Flats (in) | Thickness (in) | Weight per 1000 Pcs |
|---|---|---|---|---|---|
| M3 | 0.5 | 0.16 | 0.22 | 0.16 | 0.598 |
| M4 | 0.7 | 0.22 | 0.28 | 0.16 | 1.31 |
| M5 | 0.8 | 0.26 | 0.31 | 0.20 | 2.2 |
| M6 | 1 | 0.34 | 0.39 | 0.28 | 4.29 |
| M8 | 1.25 | 0.46 | 0.51 | 0.35 | 9.5 |
| M10 | 1.5 | 0.54 | 0.63 | 0.43 | 19.3 |
| M12 | 1.75 | 0.61 | 0.71 | 0.51 | 25.5 |
| M14 | 2 | 0.69 | 0.83 | 0.59 | 37 |
| M16 | 2 | 0.77 | 0.94 | 0.67 | 48.1 |
| M20 | 2.5 | 0.96 | 1.18 | 0.83 | 94.1 |
Key Features & Advantages
Precision Threading: CNC-machined threads ensure perfect compatibility with our stainless steel bolts and expansion anchors.
Aesthetic & Protective: The smooth dome design provides a decorative look for architectural projects like wind dynamic walls.
Superior Corrosion Resistance: High nickel and chromium content across all 300-series grades ensures long-term durability.
Expert Customization: Need a non-standard height, specialized thread pitch, or a unique head shape? We excel in customized processing based on your STP, DWG, or PDF drawings.
Technical Specifications (GB923 Standard)
| Specification | Details |
| Standard | GB923 / DIN1587 / ISO Equivalent |
| Material | SS201, SS304, SS316, SS316L |
| Size Range | M3 to M48 (Standard) / Custom Non-Standard Sizes |
| Thread Type | Metric Coarse / Fine / UNC / UNF |
| Surface Treatment | High-Mirror Polished, Satin, or Bright Clean |
| Compatible Parts | Wire Rope Clips, Link Chains, Pulleys |
Wide Range of Applications
Our stainless steel acorn nuts are essential components in various integrated systems:
Industrial Machinery: Protecting critical components in high-vibration equipment.
Marine Rigging: Paired with our 316 stainless steel pulleys and shackles for durable maritime fastening.
Architectural Hardware: Providing a clean finish for handrails, fencing, and custom glass structures.
Cable Systems: Securing assemblies alongside our single/double wire rope clips and stainless steel link chains.
Why Source Fasteners from YouJia Metal?
Dainan Factory Direct: Eliminate middleman costs by working with a source manufacturer.
Non-Standard Specialist: We don’t just sell off-the-shelf items; we are a dedicated custom stainless steel parts factory.
Material Certification: Every batch of pulley stainless and nuts comes with a Material Test Report (MTR) for 100% traceability.
Global Shipping: Efficient logistics to North America, Europe, and the Middle East with secure export packaging.
Frequently Asked Questions (FAQ)
Q: Can you provide GB923 cap nuts in custom heights?
A: Yes. As an expert in customized processing, we can adjust the dome height and internal thread depth to match your specific non-standard application.
Q: Do you support 1000PCS bulk packaging?
A: Absolutely. Most of our small fasteners like cap nuts and hex nuts are available in 1000 Pcs/Pack or bulk export cartons for maximum shipping efficiency.
Q: How to ensure the reliability of cap nuts in high-vibration industrial machinery?
A: We recommend using our 304/316 stainless steel cap nuts with precise threading (GB923/DIN1587 standard) to provide a secure fit. For extreme vibration, they can be paired with lock washers to prevent loosening and protect bolt threads from debris.
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Contact YouJia Metal today for wholesale pricing on GB923 stainless steel dome nuts. Request a free quote or send us your custom technical drawings now!
WhatsApp: +86 15952693580
