30PCS Red VMQ Silicone O-Rings CS1.5mm OD21-30mm Gasket Washers

30-Pack Red VMQ Silicone O-Rings — Reliable Sealing for Machinery & Plumbing

Keep your machinery and plumbing connections leak-free with this convenient 30-piece set of red VMQ silicone rubber O-rings. Featuring a cross-section diameter (CS) of 1.5mm and outer diameters (OD) ranging from 21mm to 30mm, these ring gaskets deliver consistent, long-lasting sealing performance across a wide range of applications.

Why Choose These Silicone O-Rings?

• Premium VMQ Silicone Material: High-grade silicone rubber offers excellent elasticity, flexibility, and resistance to heat, cold, and many common fluids.
• Wide Temperature Range: Maintains a reliable seal in demanding environments, from low-temperature cold-water lines to high-temperature machinery systems.
• Great Elasticity: Conforms tightly to mating surfaces for a consistent, pressure-resistant seal every time.
• Versatile Sizing: OD range of 21–30mm in a single pack gives you multiple sizing options — ideal for a variety of fittings, valves, pumps, and connectors.
• Value Pack: 30 pieces per lot means you always have a spare on hand for quick maintenance and replacements.
• Easy to Install: Flexible construction allows quick installation without special tools.

Specifications

Common Applications

• Plumbing fittings, pipes, and valves
• Hydraulic and pneumatic systems
• Pumps, compressors, and motors
• Automotive fluid systems
• Industrial machinery maintenance
• DIY repairs and home improvement projects

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Frequently Asked Questions

Q: What sizes are included in this 30-piece VMQ silicone O-ring set?

A: This set includes silicone rubber O-rings with a cross-section (CS) of 1.5mm and outer diameters (OD) ranging from 21mm to 30mm, giving you a practical assortment for various machinery and plumbing fitting sizes.

Q: What makes VMQ silicone a good material for O-rings and gasket washers?

A: VMQ (Vinyl Methyl Silicone) rubber is prized for its outstanding elasticity, wide temperature tolerance, and resistance to water, oils, and many chemicals. This makes it ideal for dependable sealing in both plumbing and industrial machinery applications.

Q: Can these O-rings be used in high-temperature environments?

A: Yes. VMQ silicone rubber is well-suited for elevated-temperature applications, maintaining its shape and sealing performance across a broad temperature range — making it a popular choice for machinery, automotive, and hot-water plumbing systems.

Q: How many O-rings come in one lot, and what are they used for?

A: Each lot contains 30 red silicone O-rings. They are commonly used as gasket washers and seals in plumbing connections, valves, pumps, hydraulic systems, compressors, and general machinery maintenance.

Production & Packaging Notice

To 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.