50PCS Red VMQ Silicone O-Rings CS1.5mm OD13.5–20mm Gasket Seals

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

Keep your systems leak-free with these premium Red VMQ Silicone O-Rings. Each pack contains 50 pieces with a cross-section of CS 1.5mm and outer diameters ranging from OD 13.5mm to 20mm. Manufactured from high-grade VMQ silicone rubber, these ring gaskets deliver excellent elasticity, temperature resistance, and long-lasting compression set performance — making them the go-to sealing solution for both professional and DIY applications.

Made in Mainland China.

Key Features

• Material: Premium VMQ Silicone Rubber — odorless, non-toxic, and chemically stable
• Color: Red — easy to spot during installation and maintenance
• Cross-Section (CS): 1.5mm for a precise, uniform seal
• Outer Diameter (OD): 13.5mm to 20mm — multiple sizes included in one convenient pack
• Quantity: 50 pieces per lot — great value for workshops, maintenance crews, and hobbyists
• Shape: Standard ring gasket for universal compatibility
• High elasticity ensures a snug fit and effective seal across a wide range of groove dimensions
• Temperature resistant — performs reliably across a broad operating temperature range

Ideal Applications

• Plumbing pipe joints and fittings
• Hydraulic and pneumatic systems
• Industrial machinery and equipment seals
• Automotive fluid systems and fuel lines
• Water pumps and valves
• DIY home repair and maintenance projects

Specifications

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Frequently Asked Questions

Q: What sizes of O-rings are included in this 50-piece lot?

A: This pack contains red VMQ silicone O-rings with a cross-section (CS) of 1.5mm and outer diameters (OD) ranging from 13.5mm to 20mm. The exact size assortment within this OD range is included in the lot, giving you multiple dimensions for various sealing tasks.

Q: What is VMQ silicone rubber and why is it used for O-rings?

A: VMQ stands for Vinyl Methyl Silicone, a type of silicone rubber known for its outstanding elasticity, wide temperature tolerance, and chemical stability. It is commonly used in O-rings and gaskets for plumbing, machinery, and automotive applications because it maintains its sealing properties under demanding conditions without degrading quickly.

Q: Are these O-rings suitable for both water and oil applications?

A: VMQ silicone O-rings perform well in water, steam, and mild oil environments. They are widely used in plumbing joints, hydraulic systems, and general machinery sealing. For heavy petroleum or fuel exposure, always verify compatibility with your specific fluid type before installation.

Q: How do I choose the right O-ring size for my application?

A: To select the correct O-ring, measure the groove's inner diameter and the groove width (cross-section). The O-ring's OD should match the groove diameter, and the CS should match the groove width for a proper compression fit. These standard-sized VMQ O-rings are compatible with most machinery and plumbing fittings designed around 1.5mm cross-section grooves.

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.