<h2>5-Pack NBR Rubber O-Ring Seal Gaskets – CS 3.55mm</h2> <p>Keep your machinery, plumbing, and industrial assemblies leak-free with these heavy-duty <strong>NBR (Nitrile Butadiene Rubber) O-Rings</strong>. Sold in a convenient 5-piece lot, these standard ring gaskets feature a cross-section of 3.55mm and are available in a wide range of inner diameters — from 90mm up to 155mm — making them a versatile solution for a broad spectrum of industrial, mechanical, and hydraulic sealing applications.</p> <h3>Key Features</h3> <ul> <li> <strong>Material:</strong> Premium NBR (Nitrile Butadiene Rubber) — excellent resistance to oils, fuels, and hydraulic fluids</li> <li> <strong>Cross-Section (CS):</strong> 3.55mm for a consistent, reliable seal</li> <li> <strong>Available Inner Diameters (ID):</strong> 90 / 92.5 / 95 / 97.5 / 100 / 125 / 132 / 155mm</li> <li> <strong>Quantity:</strong> 5 pieces per lot</li> <li> <strong>Shape:</strong> Standard ring gasket / toroidal profile</li> <li> <strong>Standard:</strong> Manufactured to industry-standard dimensions for easy cross-referencing and replacement</li> <li> <strong>Application:</strong> Ideal for pumps, valves, hydraulic cylinders, pipework fittings, compressors, and general industrial machinery</li> <li> <strong>Temperature Range:</strong> Suitable for a wide operating temperature range typical of NBR compounds</li> </ul> <h3>Why Choose NBR O-Rings?</h3> <p>NBR rubber is one of the most widely used elastomers in sealing technology. Its strong resistance to petroleum-based oils, greases, and hydraulic fluids makes it the go-to choice for automotive, manufacturing, and industrial sealing tasks. These O-rings form a tight, durable seal that helps prevent fluid and gas leakage in both static and dynamic applications.</p> <h3>Specifications</h3> <table> <tr> <td><strong>Brand</strong></td> <td>Ouling</td> </tr> <tr> <td><strong>Material</strong></td> <td>NBR Rubber</td> </tr> <tr> <td><strong>Cross-Section (CS)</strong></td> <td>3.55mm</td> </tr> <tr> <td><strong>Inner Diameter Options</strong></td> <td>90, 92.5, 95, 97.5, 100, 125, 132, 155mm</td> </tr> <tr> <td><strong>Quantity per Pack</strong></td> <td>5 pieces</td> </tr> <tr> <td><strong>Shape</strong></td> <td>Ring Gasket</td> </tr> <tr> <td><strong>Standard</strong></td> <td>Standard</td> </tr> <tr> <td><strong>Country of Origin</strong></td> <td>Made in Mainland China</td> </tr> </table> <h3>Related Products You May Like</h3> <ul> <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> <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/personal-protective-equipment" target="_blank" rel="noopener">OSHA on personal protective equipment</a></p> <h3>Frequently Asked Questions</h3> <h4>Q: What sizes of inner diameters are available for these NBR O-rings?</h4> <p>A: These NBR rubber O-rings are available in the following inner diameter sizes: 90mm, 92.5mm, 95mm, 97.5mm, 100mm, 125mm, 132mm, and 155mm — all with a cross-section of 3.55mm. Select your required ID when ordering.</p> <h4>Q: What are NBR O-rings best used for?</h4> <p>A: NBR (Nitrile Butadiene Rubber) O-rings are ideal for sealing applications involving petroleum-based oils, hydraulic fluids, fuels, and greases. They are commonly used in pumps, valves, compressors, automotive systems, and general industrial machinery where a reliable, leak-proof seal is required.</p> <h4>Q: How many O-rings come in one order?</h4>