Nitrile Rubber Gasket (NBR / Buna-N) – Oil-Resistant Sealing Solution | Style KXT 3030
Looking for a dependable nitrile rubber gasket supplier? Ningbo Kaxite Sealing Materials Co., Ltd. is an ISO 9001:2015 certified nitrile rubber gasket manufacturer based in Ningbo, China. Since 2015 we have produced oil-resistant NBR gaskets (Style KXT 3030) and exported them to more than 100 countries. Every shipment is backed by full material traceability and a batch-level COA (Certificate of Analysis).
ISO 9001:2015 Certified Audited quality management system
Manufacturer Since 2015 10+ years of rubber gasket production
Exported to 100+ Countries Automotive, oil & gas, chemical
Free Sample & OEM Custom sizes, thickness, hardness
Need Nitrile Rubber Gaskets Priced for Your Project?
Send your dimensions, thickness and order quantity — our sealing engineers reply within 24 hours with pricing, lead time and a free sample offer.
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What Is a Nitrile Rubber Gasket?
A nitrile rubber gasket (also called an NBR gasket or Buna-N gasket) is a sealing component produced from a copolymer of butadiene and acrylonitrile. That molecular structure is what gives the material its signature performance: outstanding resistance to petroleum-based oils, greases and fuels, combined with excellent abrasion resistance and reliable air tightness.
Our oil resistant rubber gasket is manufactured either by precision compression molding or by die-cutting from high-grade NBR sheet, available in thicknesses from 1/32" to 2" (0.8 mm – 50.8 mm) and in Shore A hardness from 40 to 90. Compared with natural rubber, SBR and EPDM, the nitrile rubber gasket delivers markedly longer service life in oil-rich environments — which is why maintenance engineers and MRO buyers specify it for engine, fuel system, hydraulic and refinery sealing duties.
Why Buyers Choose Our Nitrile Rubber Gaskets
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Excellent oil and fuel resistance: formulated for petroleum-based oils, aromatic fuels, mineral oils, animal and vegetable oils, solvents and hydraulic fluids.
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Superior abrasion resistance: the NBR gasket holds its sealing integrity under high compression loads and vibration, reducing maintenance frequency and unplanned downtime.
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Wide operating window: reliable from -25°F to +170°F (-32°C to +77°C) with a maximum operating pressure of 150 psi (10.3 bar).
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Excellent air tightness: ideal for pneumatic and hydraulic sealing where gas leakage is unacceptable.
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Anti-aging performance: resists degradation and maintains sealing force over extended service periods.
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Cost-effective: compared with specialty elastomers such as Viton® or silicone, the NBR gasket delivers strong oil-resistant performance at a competitive price point.
Technical Specifications – Style KXT 3030
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Parameter
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Specification / Range
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Material
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Nitrile Butadiene Rubber (NBR / Buna-N)
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Model / Style
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KXT 3030
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Temperature Range
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-25°F to +170°F (-32°C to +77°C)
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Max. Operating Pressure
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150 psi (10.3 bar)
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Available Thicknesses
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1/32" to 2" (0.8 mm – 50.8 mm)
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Hardness (Shore A)
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40 – 90 (customizable)
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Density (typical)
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1.0 – 1.2 g/cm³
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Acrylonitrile Content
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18% – 50% (selected to match fluid exposure)
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FDA Compliance
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Available in FDA-grade materials
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Chemical Compatibility
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Oil, aromatic fuels, mineral / vegetable oils, solvents, hydraulic fluids
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Not Recommended For
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Ketones, esters, chlorinated hydrocarbons, strong oxidizing agents
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Quality Documents
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Batch-level COA, material traceability, dimensional inspection report
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Typical Applications
Procurement teams and maintenance engineers specify our nitrile rubber gaskets for the following demanding environments:
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Automotive: engine components, fuel systems, transmission seals and oil pan gaskets.
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Oil & Gas: pipeline flanges, refinery equipment and offshore platform sealing.
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Chemical Processing: pumps, valves and flanges handling mineral oils, solvents and hydraulic fluids.
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Industrial Manufacturing: machinery sealing, pneumatic systems and hydraulic equipment.
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Food & Beverage: FDA-grade nitrile rubber gaskets for processing and packaging equipment.
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Pharmaceutical: sanitary sealing where FDA-compliant materials are required.
For sanitary connections, pair our NBR gaskets with the EPDM Tri-Clamp Screen Sanitary Gasket. For applications with aggressive chemicals or higher temperatures, compare our PTFE Gaskets and Styrene-Butadiene Rubber Gaskets.
Custom Nitrile Rubber Gaskets – OEM & ODM
Our ISO 9001:2015 certified engineering team supports custom nitrile rubber gasket projects end to end. Typical customization scope includes:
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Custom outer diameter, inner diameter and bolt-hole patterns for standard flange sizes.
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Non-standard thicknesses from 0.8 mm to 50.8 mm, plus die-cut and waterjet-cut profiles.
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Shore A hardness from 40 to 90, selected for your specific bolt load and fluid medium.
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FDA-grade NBR compounds for food processing and pharmaceutical lines.
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Private-label packaging and buyer-specified marking for OEM programs.
Send a drawing, a sample or even a photo with dimensions and we will return a feasibility assessment and quotation — usually within 24 hours.
Quality Assurance & Documentation
As a Chinese nitrile rubber gasket factory with 10+ years of production history, we treat documentation as part of the product. Every order can be supplied with:
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Batch-level Certificate of Analysis (COA) with hardness, tensile strength and elongation data.
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Full material traceability from compound batch to finished gasket.
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Dimensional inspection reports for die-cut and molded parts.
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Company certification records — see our Our Certificate page.
Learn more about our production capability on the About Us page and review packing details on Packaging & Shipping.
Ordering, Lead Time & Shipping
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Item
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Details
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Stock items
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Standard sheet sizes and thicknesses ship in 3–5 working days
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Custom / die-cut gaskets
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Typically 7–12 working days, depending on quantity and profile complexity
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Sample policy
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Free samples available for qualified buyers to validate material and fit
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Packaging
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Export cartons with moisture protection; palletized and shrink-wrapped on request
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Shipping
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Express (DHL / FedEx / UPS), air freight and sea freight with full export documentation
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Pricing
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Direct factory wholesale pricing; volume discounts on request
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Trust your critical oil-resistant sealing applications to a partner with proven expertise.
Contact our technical sales team today to discuss your temperature, pressure and chemical compatibility requirements. We provide full engineering support and rapid quotation for both standard and custom-engineered nitrile rubber gasket solutions. Call +86-574-87527771 or email kaxite@seal-china.com.
Complete Your Sealing System
Explore the full Rubber Gaskets range, or browse related sealing products for every operating condition:
Frequently Asked Questions About Nitrile Rubber Gaskets
Quick answers to the questions buyers ask most often about our nitrile rubber gaskets (Style KXT 3030).
Q1: What is a nitrile rubber gasket?
A nitrile rubber gasket (NBR gasket) is a sealing component manufactured from nitrile butadiene rubber, offering exceptional oil resistance, excellent abrasion resistance and reliable sealing performance. The NBR gasket is widely used in automotive, oil & gas and industrial applications where exposure to petroleum-based fluids is common.
Q2: What temperature and pressure can the nitrile rubber gasket withstand?
Our nitrile rubber gasket (Style KXT 3030) operates reliably from -25°F to +170°F (-32°C to +77°C) with a maximum pressure rating of 150 psi (10.3 bar). For higher-temperature service, our technical team can recommend alternative compounds.
Q3: Is the nitrile rubber gasket chemically compatible with oils and fuels?
Yes. The nitrile rubber gasket is specifically formulated for excellent resistance to petroleum-based oils, aromatic fuels, mineral oils, animal and vegetable oils, solvents and hydraulic fluids. It is not recommended for ketones, esters, chlorinated hydrocarbons or strong oxidizing agents.
Q4: Can I get FDA-grade nitrile rubber gaskets?
Yes. Our nitrile rubber gaskets are available in FDA-grade materials suitable for food processing, pharmaceutical and sanitary applications. Please specify your FDA-grade requirement when requesting a quotation so we can select the correct compound.
Q5: Do you offer customized nitrile rubber gaskets?
Absolutely. Our ISO 9001:2015 certified engineering team supports OEM and ODM services for nitrile rubber gaskets. We customize dimensions, thicknesses, Shore hardness levels (40–90) and supply die-cut gaskets in any size. Full technical consultation and rapid quotation are available for both standard and custom-engineered solutions.
Q6: What is the typical lead time for nitrile rubber gasket orders?
For standard nitrile rubber gasket sheet sizes and thicknesses, lead time is 3–5 working days for stock items. For custom die-cut gaskets, non-standard thicknesses or large batch orders, typical production time is 7–12 working days, depending on quantity and complexity. Express shipping options are available for urgent requirements.
Q7: Can I get a free sample before placing a bulk order?
Yes. We offer free samples of our standard nitrile rubber gasket materials so you can verify hardness, surface finish and dimensional fit before committing to volume production. Send your required size and quantity through the inquiry form and our sales team will arrange shipment.
Q8: How do I request a wholesale price for nitrile rubber gaskets?
Submit your specification — dimensions, thickness, Shore A hardness, quantity and destination port — through the
inquiry form or email
kaxite@seal-china.com. Our export team replies within 24 hours with FOB pricing, minimum order quantity, lead time and shipping options.
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