{"product_id":"3-pack-nbr-rubber-o-rings-cs5-3mm-industrial-sealing-gaskets","title":"3-Pack NBR O-Rings CS5.3mm – Industrial Rubber Sealing Gaskets","description":"\u003ch2\u003e3-Pack NBR Rubber O-Ring Sealing Gaskets – CS 5.3mm\u003c\/h2\u003e\n\u003cp\u003eKeep your machinery, plumbing, and industrial equipment operating at peak performance with these high-quality \u003cstrong\u003eNBR (Nitrile Butadiene Rubber) O-Rings\u003c\/strong\u003e. Each pack contains \u003cstrong\u003e3 pieces\u003c\/strong\u003e with a cross-section of \u003cstrong\u003e5.3mm\u003c\/strong\u003e, available in a wide range of inner diameters — from 82.5mm up to 185mm — making them a versatile choice for professional and DIY applications alike.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose These O-Rings?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium NBR Material:\u003c\/strong\u003e Nitrile rubber offers excellent resistance to oils, fuels, hydraulic fluids, and many industrial chemicals, ensuring a long-lasting, reliable seal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConsistent Cross-Section:\u003c\/strong\u003e Uniform CS of 5.3mm delivers a precise, leak-free fit in compatible grooves and housings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Size Range:\u003c\/strong\u003e Inner diameters of 82.5 \/ 85 \/ 87.5 \/ 90 \/ 92.5 \/ 95 \/ 97.5 \/ 100 \/ 140 \/ 185mm — choose the size that matches your application perfectly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRing Gasket Shape:\u003c\/strong\u003e Classic O-ring profile designed for face-seal, radial-seal, and static sealing configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Application Range:\u003c\/strong\u003e Suitable for hydraulic systems, pneumatic equipment, automotive components, water fittings, industrial machinery, and general plumbing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack of 3:\u003c\/strong\u003e Convenient multi-pack keeps spares on hand for maintenance and replacement tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNBR (Nitrile Butadiene Rubber)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCross-Section (CS)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Inner Diameters (ID)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e82.5 \/ 85 \/ 87.5 \/ 90 \/ 92.5 \/ 95 \/ 97.5 \/ 100 \/ 140 \/ 185mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRing Gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 Pieces per Pack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh-Concern Chemicals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHydraulic and pneumatic systems\u003c\/li\u003e\n  \u003cli\u003eAutomotive engine and fuel systems\u003c\/li\u003e\n  \u003cli\u003eWater pumps and plumbing fittings\u003c\/li\u003e\n  \u003cli\u003eIndustrial machinery and equipment seals\u003c\/li\u003e\n  \u003cli\u003eDIY home repair and maintenance projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed\"\u003e10\/20mm Diamond Flat Grinding Wheel – Dry and Wet Use Heavy Duty Concrete Grinder\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What material are these O-rings made from, and what fluids can they resist?\u003c\/h4\u003e\n\u003cp\u003eA: These O-rings are made from NBR (Nitrile Butadiene Rubber), which provides strong resistance to petroleum-based oils, hydraulic fluids, fuels, grease, and many common industrial chemicals. They are not recommended for use with ketones, esters, or strong acids without verification of compatibility.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I choose the correct inner diameter (ID) for my application?\u003c\/h4\u003e\n\u003cp\u003eA: Measure the groove or bore where the O-ring will sit. The inner diameter should match the inner edge of the groove. Available IDs in this listing are 82.5, 85, 87.5, 90, 92.5, 95, 97.5, 100, 140, and 185mm — all with a uniform 5.3mm cross-section. Select your size at checkout.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many O-rings come in each pack?\u003c\/h4\u003e\n\u003cp\u003eA: Each pack contains 3 pieces of the same size, giving you extras for replacements or future maintenance needs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these O-rings suitable for both static and dynamic sealing applications?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. These NBR O-rings are well-suited for static sealing applications such as pipe fittings and flanges, as well as low-speed dynamic applications. For high-speed rotary or reciprocating dynamic seals, verify compatibility with your system's operating pressures and temperatures before use.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What material are these O-rings made from, and what fluids can they resist?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These O-rings are made from NBR (Nitrile Butadiene Rubber), which provides strong resistance to petroleum-based oils, hydraulic fluids, fuels, grease, and many common industrial chemicals. They are not recommended for use with ketones, esters, or strong acids without verification of compatibility.\"}}, {\"@type\": \"Question\", \"name\": \"How do I choose the correct inner diameter (ID) for my application?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Measure the groove or bore where the O-ring will sit. The inner diameter should match the inner edge of the groove. Available IDs in this listing are 82.5, 85, 87.5, 90, 92.5, 95, 97.5, 100, 140, and 185mm — all with a uniform 5.3mm cross-section. Select your size at checkout.\"}}, {\"@type\": \"Question\", \"name\": \"How many O-rings come in each pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each pack contains 3 pieces of the same size, giving you extras for replacements or future maintenance needs.\"}}, {\"@type\": \"Question\", \"name\": \"Are these O-rings suitable for both static and dynamic sealing applications?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. These NBR O-rings are well-suited for static sealing applications such as pipe fittings and flanges, as well as low-speed dynamic applications. 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