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Help CenterStainless Steel O-Ring Buna-N Coated -40°C to 120°C CNC Turned Parts Wholesale Supplier China Custom Size
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Welcome to Dongguan HonHo Jewelry Co., Ltd. – Your trusted partner for precision CNC turned parts. Since 2010, we have been manufacturing high-quality metal components for global industries. Our Stainless Steel O-Ring Buna-N Coated parts are engineered to deliver reliable sealing performance in extreme environments, from -40°C to 120°C. With over 10 years of experience, a factory spanning 3,000-5,000 square meters, and a dedicated team of 51-100 skilled workers, we offer wholesale supply of custom-size parts tailored to your exact specifications. Choose us for consistent quality, competitive pricing, and fast delivery from our ports in Shenzhen, Dongguan, and Guangzhou.
Product Overview
Our Stainless Steel O-Ring with Buna-N Coating combines the strength of stainless steel with the elastic sealing capability of nitrile rubber. The Buna-N (NBR) coating provides excellent resistance to oils, fuels, and hydraulic fluids, while the stainless steel core ensures dimensional stability and withstands high pressure. These CNC turned parts are precision-machined to tight tolerances, making them ideal for dynamic and static sealing applications in automotive, industrial machinery, and fluid power systems.
Key Features & Benefits
- High Temperature Resistance: Operates from -40°C to 120°C, suitable for extreme cold and hot environments without losing flexibility or sealing integrity.
- Corrosion Resistant Core: Stainless steel (304/316 optional) resists rust and chemical attack, extending product lifespan.
- Excellent Chemical Compatibility: Buna-N coating withstands mineral oils, greases, diesel, and many industrial fluids – perfect for hydraulic systems.
- Precision CNC Machining: All parts are turned on advanced CNC lathes to achieve tight tolerances (e.g., ±0.05mm) and smooth surface finishes.
- Custom Sizes Available: We can manufacture any inner diameter, outer diameter, and cross-section to meet your design requirements. Minimum order quantity (MOQ) is flexible for wholesale orders.
- Cost-Effective Wholesale: As a direct manufacturer with over US$2.5 million annual export value, we offer factory-direct pricing without intermediaries.
Technical Specifications
| Parameter | Value / Description |
|---|---|
| Material | Stainless Steel (304, 316, or other upon request) |
| Coating | Buna-N (Nitrile Rubber), thickness customizable |
| Temperature Range | -40°C to +120°C |
| Hardness (Shore A) | 70 ±5 (standard); other available upon request |
| Dimensions | Custom: ID from 5mm to 500mm, cross-section 1mm to 20mm |
| Tolerance | ±0.05mm (standard); tighter available |
| Surface Finish | Ra ≤ 1.6 μm (mirror finish optional) |
| Standards | Compliant with ISO 3601 (O-ring dimensions), ISO9001 certified production |
Applications
- Hydraulic cylinders and pumps
- Pneumatic systems and valves
- Automotive fuel systems and transmission seals
- Industrial machinery and processing equipment
- Oil and gas components
- General fluid power sealing
Why Choose Dongguan HonHo Jewelry Co., Ltd.?
We are an experienced manufacturer with ISO9001 certification, ensuring strict quality control from raw material to finished product. Our factory utilizes advanced CNC lathes and inspection equipment (CMM, hardness testers, optical comparators) to guarantee every part meets your specifications. With annual export value exceeding US$2.5 million, we have shipped to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our dedicated sales team provides prompt responses and samples for evaluation. We understand the importance of reliable sealing components – let us be your long-term supplier for stainless steel o-rings and custom CNC turned parts.
Frequently Asked Questions
-
Q: What materials are available for the core?
A: We offer stainless steel 304 and 316 as standard. Other grades like 303, 316L, or even carbon steel with coating are available upon request. -
Q: Can you provide samples before bulk order?
A: Yes, we can provide samples for customer evaluation. Sample cost is negotiable and will be deducted from future bulk orders. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is 100 pieces. For custom sizes, MOQ may vary depending on complexity; please contact us for details. -
Q: How long does production take?
A: Typical lead time is 15-25 working days after design approval. Rush orders can be arranged. -
Q: Is the Buna-N coating resistant to UV or ozone?
A: Buna-N (Nitrile) has limited UV/ozone resistance. If exposure to sunlight or ozone is expected, we recommend FKM (Viton) coating – available upon request. -
Q: Do you offer other coating materials?
A: Yes, we can apply PTFE, silicone, or FKM coatings. Please specify your requirements. -
Q: Can you provide a certificate of conformance or material test report?
A: Yes, we can issue a certificate of conformance and mill test reports for stainless steel as per ISO9001 procedures. -
Q: What are your payment terms?
A: Common terms include T/T (30% deposit, 70% before shipment) or L/C. Flexible terms for long-term partners.
Contact us today to discuss your custom stainless steel o-ring needs. With our ISO9001 certified production, competitive pricing, and global shipping capabilities from Shenzhen/Dongguan/Guangzhou ports, we are your ideal partner for wholesale precision sealing solutions. Request a quote or sample now!
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