<h2>50-Pack NBR Rubber O-Ring Seal Gaskets — CS 3.55mm | ID 17/18/19/20mm</h2> <p>Keep your plumbing, hydraulic, pneumatic, and industrial assemblies leak-free with these heavy-duty <strong>Nitrile Butadiene Rubber (NBR) O-Rings</strong>. Each pack contains <strong>50 pieces</strong> of standard-grade ring gaskets engineered for a wide range of sealing applications. Whether you're a professional technician or a hands-on DIYer, these versatile washers deliver reliable performance across countless systems.</p> <h3>Key Features</h3> <ul> <li> <strong>Material:</strong> Premium NBR (Nitrile Butadiene Rubber) — excellent resistance to oils, fuels, and common industrial fluids</li> <li> <strong>Cross-Section (CS):</strong> 3.55 mm for a secure, consistent seal</li> <li> <strong>Inner Diameter (ID) Options:</strong> 17 mm, 18 mm, 19 mm, or 20 mm — select the size that fits your application</li> <li> <strong>Shape:</strong> Standard ring gasket profile for universal compatibility</li> <li> <strong>Pack Size:</strong> 50 pieces per lot — great for workshop stocking and bulk maintenance tasks</li> <li> <strong>Standard Grade:</strong> Conforms to standard O-ring dimensions for easy replacement in existing equipment</li> <li> <strong>Temperature &amp; Fluid Resistant:</strong> NBR compound withstands exposure to petroleum-based oils, water, and many hydraulic fluids</li> <li> <strong>Flexible &amp; Durable:</strong> Maintains elasticity over repeated compression cycles to reduce leakage risk</li> </ul> <h3>Common Applications</h3> <ul> <li>Plumbing fittings and pipe connections</li> <li>Hydraulic and pneumatic systems</li> <li>Automotive engine and fuel systems</li> <li>Industrial machinery and equipment maintenance</li> <li>Water pumps, valves, and compressors</li> <li>General DIY sealing and repair projects</li> </ul> <h3>Specifications</h3> <table style="border-collapse:collapse;width:100%;"> <tr style="background:#f5f5f5;"> <th style="border:1px solid #ddd;padding:8px;text-align:left;">Spec</th> <th style="border:1px solid #ddd;padding:8px;text-align:left;">Details</th> </tr> <tr> <td style="border:1px solid #ddd;padding:8px;">Material</td> <td style="border:1px solid #ddd;padding:8px;">NBR Rubber</td> </tr> <tr style="background:#f5f5f5;"> <td style="border:1px solid #ddd;padding:8px;">Cross-Section (CS)</td> <td style="border:1px solid #ddd;padding:8px;">3.55 mm</td> </tr> <tr> <td style="border:1px solid #ddd;padding:8px;">Inner Diameter (ID)</td> <td style="border:1px solid #ddd;padding:8px;">17 mm / 18 mm / 19 mm / 20 mm</td> </tr> <tr style="background:#f5f5f5;"> <td style="border:1px solid #ddd;padding:8px;">Shape</td> <td style="border:1px solid #ddd;padding:8px;">Ring Gasket</td> </tr> <tr> <td style="border:1px solid #ddd;padding:8px;">Quantity</td> <td style="border:1px solid #ddd;padding:8px;">50 pieces per pack</td> </tr> <tr style="background:#f5f5f5;"> <td style="border:1px solid #ddd;padding:8px;">Standard</td> <td style="border:1px solid #ddd;padding:8px;">Standard</td> </tr> <tr> <td style="border:1px solid #ddd;padding:8px;">Country of Origin</td> <td style="border:1px solid #ddd;padding:8px;">Made in China</td> </tr> </table> <h3>Related Products You May Need</h3> <p>Looking for more hardware and tools for your projects? 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/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed">10/20mm Diamond Flat Grinding Wheel – Heavy Duty Concrete Grinder</a></li>