PTFE Teflon Flat Gasket Washer M4–M57 | 1–3mm Seal Ring

PTFE Flat Gasket Washers — Corrosion-Resistant Teflon Seals

Keep your connections leak-free and chemically secure with these precision-engineered PTFE (Teflon) Flat Gasket Washers. Available in a wide range of inner hole diameters (M4 to M57) and heights (1 mm, 2 mm, 2.5 mm, and 3 mm), these white flat washers are the go-to sealing solution for plumbing, industrial, laboratory, and mechanical applications where chemical resistance and durability are non-negotiable.

Made in Mainland China.

Why Choose PTFE Flat Gaskets?

• Outstanding Chemical Resistance: PTFE (Polytetrafluoroethylene / Teflon) resists virtually all acids, bases, solvents, and aggressive chemicals — ideal for demanding environments.
• Wide Temperature Range: Performs reliably across a broad spectrum of temperatures, from sub-zero cold to high-heat industrial settings.
• Non-Stick & Low Friction: The inherently slippery PTFE surface reduces friction, making installation and removal clean and simple.
• Excellent Sealing Performance: Creates a tight, dependable seal that helps prevent leaks in fluid and gas systems.
• Electrically Insulating: PTFE is a superior electrical insulator, adding safety in mixed-material assemblies.
• Durable & Long-Lasting: Resistant to UV, weathering, and aging — these gaskets hold up over years of use.
• Standard Flat Shape: Universal flat gasket form fits a wide variety of bolts, fittings, and flanges.

Product Specifications

Common Applications

• Plumbing pipe fittings and flanges
• Chemical processing equipment
• Laboratory and scientific apparatus
• Hydraulic and pneumatic systems
• Electrical insulation assemblies
• Food and beverage processing equipment
• Automotive and mechanical assemblies

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Frequently Asked Questions

Q: What sizes of PTFE flat gaskets are available?

A: These PTFE flat gaskets are available with inner hole diameters ranging from M4 to M57 mm, and in four thickness/height options: 1 mm, 2 mm, 2.5 mm, and 3 mm. This wide size range makes them suitable for a broad variety of bolts, fittings, and flanged connections.

Q: Are these PTFE gaskets suitable for use with aggressive chemicals?

A: Yes. PTFE (Polytetrafluoroethylene), also known as Teflon, is one of the most chemically resistant materials available. These flat gaskets resist attack from most acids, alkalis, solvents, and corrosive substances, making them ideal for chemical processing, laboratory, and industrial sealing applications.

Q: Can these flat washers be used for both fluid and gas sealing?

A: Absolutely. PTFE flat gaskets are widely used to create reliable seals in both liquid and gas systems. Their non-porous structure and compressibility allow them to form tight seals in flanged pipe connections, fittings, and equipment joints.

Q: How do I select the right size PTFE gasket for my application?

A: Match the inner hole diameter (M4–M57) to the bolt or fitting size you are sealing, and choose a thickness (1 mm, 2 mm, 2.5 mm, or 3 mm) based on the gap or flange recess you need to fill. If you are unsure, measure your existing gasket or consult your equipment's technical specifications.

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.