AS568-027 High-Performance PTFE (Teflon®) White 55 Shore D O-Rings

AS568-027 PTFE 55D O-Ring White 5/8" ID X 0.139" CS

Stop leaks in extreme environments with a seal that simply does not break down. The AS568-027 High-Performance PTFE O-Ring is built for applications where standard rubber O-Rings fail. With a 55 Shore D hardness and white PTFE construction, this O-Ring delivers unmatched chemical resistance, ultra-low friction, and reliable sealing across a massive temperature range.

For customers dealing with aggressive chemicals, high heat, or critical uptime requirements, this O-Ring reduces failures, extends maintenance intervals, and protects your equipment. It is a dependable solution when performance matters most and downtime is not an option.

Operating temperature: -328° to +500°F (–200° to +260°C)

This O-Ring is manufactured from PTFE (Polytetrafluoroethylene), a high-performance thermoplastic known for its near-universal chemical resistance and stability in extreme conditions.

Material & Performance Details:

• Compound: PTFE (Teflon® equivalent)
• Durometer: 55 Shore D
• Color: White

PTFE offers exceptional durability in environments that quickly degrade elastomers. Its non-stick surface and low coefficient of friction make installation easier and reduce wear in static applications.

Chemical Compatibility:

• Excellent resistance to: Acids, solvents, fuels, oils, hydrocarbons, steam, and most industrial chemicals
• Limited capability with: Molten alkali metals, high-pressure fluorine
• Not compatible with: Extremely reactive agents under extreme conditions

Sizes & Measurements

• Dimensions: 5/8" ID X 7/8" OD X 0.139" CS
• Actual: 0.612" ID X 0.139" CS
• Metric: 15.54mm ID X 3.53mm CS
• Part Number: AS568-027
• AS568 Dash Number: -027

Applications & Use Cases

This PTFE O-Ring is ideal for demanding sealing environments across multiple industries. Common uses include chemical processing systems, pumps, valves, compressors, and fluid handling equipment. It is widely used in aerospace, pharmaceutical, and food processing applications where chemical exposure and temperature extremes are common.

Best suited for static sealing applications, this O-Ring performs exceptionally well where low friction and chemical resistance are critical.

Key Specifications

• Material: PTFE (Teflon® equivalent)
• Durometer: 55 Shore D
• Color: White
• Certifications: Available upon request
• Temperature range: -328°F to +500°F (-200°C to +260°C)
• Pressure rating: Dependent on gland design and application

Why Buy from The O-Ring Store LLC

When you are sourcing a PTFE O-Ring, you are not just buying a part. You are buying reliability. We focus on getting you the right seal the first time so you avoid rework, delays, and unnecessary downtime.

• ISO9001:2015 certified quality processes
• USA stock for fast delivery
• Same-day shipping on in-stock items
• Custom sizes and materials available
• Full lot traceability and documentation on request
• Technical support from a team that understands sealing applications

We make getting O-Rings easy. That means less guesswork and more confidence in every order.