<h2>CS3.5mm Black NBR Nitrile Rubber O-Rings – Temperature &amp; Wear Resistant Seals</h2> <p>Keep your mechanical systems leak-free and running smoothly with these high-performance <strong>CS3.5mm Black NBR Nitrile Rubber O-Rings</strong>. Crafted from premium Nitrile Butadiene Rubber (NBR), these standard ring gaskets are engineered for demanding sealing applications across industrial, automotive, plumbing, and household equipment. Their robust construction delivers excellent resistance to temperature extremes, oils, fuels, and everyday wear — making them a reliable choice for professionals and DIY enthusiasts alike.</p> <h3>Key Features</h3> <ul> <li> <strong>Material:</strong> High-grade NBR (Nitrile Butadiene Rubber) for superior durability</li> <li> <strong>Cross-Section (CS):</strong> 3.5mm for a dependable, tight seal</li> <li> <strong>Color:</strong> Classic black for broad compatibility</li> <li> <strong>Temperature Resistant:</strong> Maintains integrity across a wide temperature range</li> <li> <strong>Wear Resistant:</strong> Engineered to withstand repeated use and mechanical stress</li> <li> <strong>Shape:</strong> Standard ring gasket — fits most standard O-ring grooves</li> <li> <strong>Oil &amp; Fuel Resistant:</strong> Excellent resistance to petroleum-based fluids</li> <li> <strong>Versatile Use:</strong> Ideal for hydraulic systems, pumps, valves, fittings, and more</li> </ul> <h3>Specifications</h3> <table style="width:100%; border-collapse:collapse;"> <tr style="background:#f5f5f5;"> <th style="padding:8px; border:1px solid #ddd; text-align:left;">Property</th> <th style="padding:8px; border:1px solid #ddd; text-align:left;">Detail</th> </tr> <tr> <td style="padding:8px; border:1px solid #ddd;">Material</td> <td style="padding:8px; border:1px solid #ddd;">NBR Nitrile Rubber</td> </tr> <tr style="background:#f5f5f5;"> <td style="padding:8px; border:1px solid #ddd;">Cross-Section Diameter</td> <td style="padding:8px; border:1px solid #ddd;">CS 3.5mm</td> </tr> <tr> <td style="padding:8px; border:1px solid #ddd;">Color</td> <td style="padding:8px; border:1px solid #ddd;">Black</td> </tr> <tr style="background:#f5f5f5;"> <td style="padding:8px; border:1px solid #ddd;">Shape</td> <td style="padding:8px; border:1px solid #ddd;">Ring Gasket</td> </tr> <tr> <td style="padding:8px; border:1px solid #ddd;">Standard</td> <td style="padding:8px; border:1px solid #ddd;">Standard</td> </tr> <tr style="background:#f5f5f5;"> <td style="padding:8px; border:1px solid #ddd;">Country of Origin</td> <td style="padding:8px; border:1px solid #ddd;">Made in Mainland China</td> </tr> </table> <h3>Common Applications</h3> <ul> <li>Hydraulic and pneumatic systems</li> <li>Automotive engines and fuel systems</li> <li>Plumbing fittings and valves</li> <li>Industrial pumps and compressors</li> <li>Water filtration and irrigation equipment</li> <li>General mechanical sealing applications</li> </ul> <h3>Related Products You May Like</h3> <p>Looking for more tools and hardware essentials? Check out these great options 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 – Dry and Wet Use Heavy Duty Concrete Grinder</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 does CS3.5mm mean on an NBR O-ring?</h4> <p>A: "CS" s