<h2>CS 2.5mm Black NBR 70A Nitrile Rubber O-Ring Sealing Gaskets</h2> <p>Keep your connections leak-free and secure with these high-quality <strong>CS 2.5mm Black NBR 70A Nitrile Rubber O-Rings</strong>. Engineered from premium Nitrile Butadiene Rubber (NBR), these standard-grade ring gaskets deliver outstanding wear resistance, flexibility, and sealing performance across a wide range of applications — from plumbing and hydraulics to automotive and industrial machinery.</p> <p>Made in Mainland China.</p> <h3>Key Features</h3> <ul> <li> <strong>Material:</strong> NBR 70A Nitrile Rubber — excellent resistance to oils, fuels, and general wear</li> <li> <strong>Cross-Section (CS) Thickness:</strong> 2.5mm for a reliable, consistent seal</li> <li> <strong>Hardness:</strong> Shore 70A — ideal balance of firmness and flexibility</li> <li> <strong>Color:</strong> Black — standard for industrial and mechanical use</li> <li> <strong>Shape:</strong> Standard ring gasket profile</li> <li> <strong>Wide Compatibility:</strong> Suitable for hydraulic systems, pneumatic fittings, plumbing joints, engines, pumps, and more</li> <li> <strong>Wear-Resistant:</strong> Durable construction for long-lasting sealing performance</li> <li> <strong>Temperature Range:</strong> Performs reliably across a broad operating temperature range</li> </ul> <h3>Why Choose These O-Rings?</h3> <p>NBR (Nitrile Butadiene Rubber) is one of the most widely used sealing materials in mechanical and industrial settings. Its resistance to petroleum-based oils, water, fuels, and many solvents makes it the go-to choice for professionals and DIY enthusiasts alike. The 70A Shore hardness rating ensures these gaskets hold their shape under pressure while still conforming snugly to mating surfaces to prevent leaks.</p> <h3>Typical Applications</h3> <ul> <li>Hydraulic and pneumatic systems</li> <li>Automotive engines and fuel systems</li> <li>Plumbing and pipe fittings</li> <li>Industrial machinery and pumps</li> <li>General mechanical sealing and maintenance</li> </ul> <h3>Specifications</h3> <table style="border-collapse: collapse; width: 100%;"> <tr style="background-color: #f2f2f2;"> <th style="border: 1px solid #ddd; padding: 8px; text-align: left;">Spec</th> <th style="border: 1px solid #ddd; padding: 8px; text-align: left;">Detail</th> </tr> <tr> <td style="border: 1px solid #ddd; padding: 8px;">Material</td> <td style="border: 1px solid #ddd; padding: 8px;">NBR Nitrile Rubber</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="border: 1px solid #ddd; padding: 8px;">Hardness</td> <td style="border: 1px solid #ddd; padding: 8px;">Shore 70A</td> </tr> <tr> <td style="border: 1px solid #ddd; padding: 8px;">Cross-Section Thickness</td> <td style="border: 1px solid #ddd; padding: 8px;">2.5mm</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="border: 1px solid #ddd; padding: 8px;">Color</td> <td style="border: 1px solid #ddd; padding: 8px;">Black</td> </tr> <tr> <td style="border: 1px solid #ddd; padding: 8px;">Shape</td> <td style="border: 1px solid #ddd; padding: 8px;">Ring Gasket</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="border: 1px solid #ddd; padding: 8px;">Standard</td> <td style="border: 1px solid #ddd; padding: 8px;">Standard Grade</td> </tr> <tr> <td style="border: 1px solid #ddd; padding: 8px;">Origin</td> <td style="border: 1px solid #ddd; padding: 8px;">Mainland China</td> </tr> </table> <h3>You May Also Like</h3> <ul> <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 — Anti-Loosening Replacement Parts</a></li> <li><a href="/products/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals">10pcs 2-Pin Spring Wire Connectors – Quick