{"product_id":"red-vmq-silicone-o-rings-cs3-1mm-od21-30mm-sealing-gaskets-20pcs","title":"20PCS Red VMQ Silicone O-Rings CS3.1mm OD21-30mm Sealing Gaskets","description":"\u003ch2\u003e20-Pack Red VMQ Silicone O-Rings – Reliable Sealing for Machinery \u0026amp; Plumbing\u003c\/h2\u003e\n\u003cp\u003eKeep your systems leak-free with these premium \u003cstrong\u003eRed VMQ Silicone O-Rings\u003c\/strong\u003e. Supplied in a convenient 20-piece set, these standard ring gaskets feature a \u003cstrong\u003ecross-section (CS) of 3.1mm\u003c\/strong\u003e and outer diameters ranging from \u003cstrong\u003eOD 21mm to OD 30mm\u003c\/strong\u003e, making them a versatile fit for a wide range of machinery and plumbing applications. Crafted from high-grade VMQ (Vinyl Methyl Silicone) rubber, they deliver outstanding elasticity, excellent compression recovery, and robust resistance to heat and aging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium VMQ Silicone Rubber\u003c\/strong\u003e – High-quality material offering superior flexibility, temperature resistance, and long-term durability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExcellent Elasticity\u003c\/strong\u003e – Maintains a firm, consistent seal under pressure without cracking or deforming over time\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Ring Gasket Shape\u003c\/strong\u003e – Universally compatible with standard O-ring grooves in machinery, hydraulics, and plumbing fittings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Size Range in One Pack\u003c\/strong\u003e – CS 3.1mm with OD options from 21mm to 30mm, covering multiple sealing applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20 Pieces Per Lot\u003c\/strong\u003e – Great value multi-pack to keep spares on hand for maintenance and repairs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat \u0026amp; Chemical Resistant\u003c\/strong\u003e – VMQ silicone stands up to elevated temperatures and common industrial fluids\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo High-Concern Chemicals\u003c\/strong\u003e – Manufactured without hazardous substances for safer handling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVMQ Silicone Rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCross-Section (CS)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOuter Diameter (OD)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e21mm – 30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRing Gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eStandard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e20 Pieces per Lot\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\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\u003ePlumbing pipe fittings and valves\u003c\/li\u003e\n  \u003cli\u003eAutomotive engine and fluid systems\u003c\/li\u003e\n  \u003cli\u003eIndustrial machinery and equipment sealing\u003c\/li\u003e\n  \u003cli\u003ePumps, compressors, and fluid connectors\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\/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals\"\u003e10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals\u003c\/a\u003e\u003c\/li\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 – Heavy Duty Concrete Grinder\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does VMQ mean in VMQ silicone O-rings?\u003c\/h4\u003e\n\u003cp\u003eA: VMQ stands for Vinyl Methyl Silicone, a type of silicone rubber compounded for enhanced flexibility, wide temperature tolerance, and good resistance to heat and aging. VMQ silicone O-rings are widely used in machinery, plumbing, and automotive sealing applications where standard rubber may degrade over time.\u003c\/p\u003e\n\u003ch4\u003eQ: What size O-rings are included in this 20-piece set?\u003c\/h4\u003e\n\u003cp\u003eA: All O-rings in this lot have a cross-section (CS) of 3.1mm. The outer diameter (OD) range covers 21mm to 30mm, so the pack typically includes multiple sizes within that range — ideal for keeping a versatile assortment on hand for maintenance and repair tasks.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these red VMQ silicone gaskets suitable for plumbing and hydraulic systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. These standard ring gaskets are designed for use in a variety of sealing applications including plumbing fittings, hydraulic and pneumatic systems, pumps, valves, and general industrial machinery. The VMQ silicone material provides reliable compression recovery and a consistent, leak-resistant seal.\u003c\/p\u003e\n\u003ch4\u003eQ: How should I store unused silicone O-rings?\u003c\/h4\u003e\n\u003cp\u003eA: Store unused O-rings in a cool, dry place away from direct sunlight, UV sources, and ozone-generating equipment. Keeping them in a sealed bag or container helps maintain their elasticity and extends their service life.\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 does VMQ mean in VMQ silicone O-rings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"VMQ stands for Vinyl Methyl Silicone, a type of silicone rubber compounded for enhanced flexibility, wide temperature tolerance, and good resistance to heat and aging. 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