<h2>10-Pack Black NBR Nitrile Rubber O-Ring Seals — CS 2.4mm | OD 41–50mm</h2> <p>Keep your machinery, plumbing, and hydraulic systems running leak-free with these durable <strong>Nitrile Butadiene Rubber (NBR) O-Ring Seals</strong>. Each pack contains <strong>10 precision-formed ring gaskets</strong> with a cross-section of 2.4 mm and outer diameters spanning 41 mm to 50 mm — a range that covers a wide variety of standard industrial and residential fittings.</p> <p>Made in Mainland China.</p> <h3>Key Features</h3> <ul> <li> <strong>Oil-Resistant NBR Material:</strong> Nitrile rubber provides excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, keeping connections secure and leak-free.</li> <li> <strong>Wide Temperature Range:</strong> Rated for continuous operation from <strong>-40°C to 120°C (-40°F to 248°F)</strong>, making them suitable for both cold and high-heat environments.</li> <li> <strong>Outstanding Wear Resistance:</strong> The dense NBR compound resists abrasion and compression set, maintaining a reliable seal over extended use cycles.</li> <li> <strong>Standard Ring Gasket Shape:</strong> Uniform, precision-molded profile ensures consistent seating in standard grooves — no trimming or adjustment needed.</li> <li> <strong>Broad Application Range:</strong> Ideal for machinery, hydraulic systems, plumbing fittings, pneumatic equipment, automotive components, and general industrial sealing.</li> <li> <strong>Value Pack:</strong> 10 pieces per lot — stock up on essential sizes at an affordable per-unit cost.</li> </ul> <h3>Specifications</h3> <table> <tbody> <tr> <td><strong>Material</strong></td> <td>NBR (Nitrile Butadiene Rubber)</td> </tr> <tr> <td><strong>Color</strong></td> <td>Black</td> </tr> <tr> <td><strong>Cross Section (CS)</strong></td> <td>2.4 mm</td> </tr> <tr> <td><strong>Outer Diameter (OD)</strong></td> <td>41 mm – 50 mm (select your size)</td> </tr> <tr> <td><strong>Quantity</strong></td> <td>10 pieces per lot</td> </tr> <tr> <td><strong>Temperature Range</strong></td> <td>-40°C to 120°C</td> </tr> <tr> <td><strong>Shape</strong></td> <td>Ring Gasket (Standard)</td> </tr> <tr> <td><strong>Application</strong></td> <td>Machinery, Plumbing, Hydraulics, Automotive</td> </tr> </tbody> </table> <h3>Buying Tip</h3> <p>Need multiple sizes? Add all required sizes to your cart and check out together — combined orders may qualify for a shipping discount.</p> <p><em>Note: Due to variations in monitor calibration and lighting, the actual product color may differ very slightly from images shown.</em></p> <h3>You May Also Like</h3> <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/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed">10/20mm Diamond Flat Grinding Wheel – Dry &amp; Wet Use Heavy Duty</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 sizes are available in this NBR O-ring pack?</h4> <p>A: This listing covers O-rings with a cross-section (CS) of 2.4 mm and outer diameters (OD) ranging from 41 mm to 50 mm. Each pack contains 10 pieces of your selected OD size. If you need multiple OD sizes, simply add each size to your cart separately and check out together.</p> <h4>Q: Are these O-rings suitable for hydraulic and oil systems?</h4> <p>A: Yes. NBR (Nitrile Butadiene Rubber) is specifically formulated for oil resistance, making these gaskets well-suited for hydraulic lines, fuel systems, oil pumps, and other petroleum-fluid ap