<h2>Black NBR Nitrile Rubber O-Rings – CS5mm Sealing Gasket Washers</h2> <p>Keep your systems leak-free with these high-performance <strong>CS5mm Black NBR Nitrile Rubber O-Rings</strong>. Engineered from premium nitrile butadiene rubber (NBR), these standard ring gaskets deliver outstanding temperature resistance and wear resistance, making them a reliable sealing solution for a wide range of industrial, mechanical, automotive, and plumbing applications.</p> <h3>Key Features</h3> <ul> <li> <strong>Material:</strong> High-quality NBR (Nitrile Butadiene Rubber) — excellent resistance to oils, fuels, and hydraulic fluids</li> <li> <strong>Cross-Section (CS):</strong> 5mm thick for a secure, compression-fit seal</li> <li> <strong>Temperature Resistant:</strong> Maintains sealing integrity across a broad range of operating temperatures</li> <li> <strong>Wear Resistant:</strong> Durable construction for long-lasting, repeated use in demanding environments</li> <li> <strong>Shape:</strong> Standard ring gasket design for universal compatibility</li> <li> <strong>Color:</strong> Classic black finish</li> <li> <strong>Standard Grade:</strong> Manufactured to standard dimensions for easy replacement and cross-referencing</li> </ul> <h3>Common Applications</h3> <ul> <li>Hydraulic and pneumatic systems</li> <li>Automotive engines and fuel systems</li> <li>Plumbing fittings and pipe joints</li> <li>Industrial machinery and equipment</li> <li>Water pumps and valves</li> <li>DIY repair and maintenance projects</li> </ul> <h3>Specifications</h3> <table> <tr> <td><strong>Brand</strong></td> <td>Ouling</td> </tr> <tr> <td><strong>Material</strong></td> <td>NBR Nitrile Rubber</td> </tr> <tr> <td><strong>Cross Section (CS)</strong></td> <td>5mm</td> </tr> <tr> <td><strong>Color</strong></td> <td>Black</td> </tr> <tr> <td><strong>Shape</strong></td> <td>Ring Gasket</td> </tr> <tr> <td><strong>Standard</strong></td> <td>Standard Grade</td> </tr> <tr> <td><strong>Country of Origin</strong></td> <td>Made in China</td> </tr> </table> <h3>Related Products You May Like</h3> <p>Looking for more hardware and tool accessories? Check out these items from our store:</p> <ul> <li><a href="/products/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals">10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals</a></li> <li><a href="/products/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge">10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips</a></li> <li><a href="/products/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1">10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories</a></li> </ul> <p>Learn more: <a href="https://www.osha.gov/hand-power-tools" target="_blank" rel="noopener">OSHA guidance on hand and power tools</a></p> <h3>Frequently Asked Questions</h3> <h4>Q: What is NBR nitrile rubber and why is it used for O-rings?</h4> <p>A: NBR (Nitrile Butadiene Rubber) is a synthetic rubber compound renowned for its excellent resistance to oils, fuels, hydraulic fluids, and many common industrial chemicals. It also offers good temperature resistance and mechanical durability, making NBR nitrile rubber O-rings the go-to sealing choice for automotive, hydraulic, and industrial applications.</p> <h4>Q: What does CS5mm mean for an O-ring?</h4> <p>A: "CS" stands for Cross-Section — it refers to the diameter of the rubber ring's circular profile. A CS5mm O-ring has a 5mm thick cross-section, which determines how much compression the O-ring provides when seated in a groove, directly affecting the quality and durability of the seal.</p> <h4>Q: What temperature range can these NBR O-rings withstand?</h4> <p>A: NBR nitrile rubber O-rings generally perform well in temperature ranges from approximately -40°C to +120°C (-40°F to +248°F), though actual performance may vary depending on the specific