Description
The Mars 43331 is a 5/8″ PTFE (Polytetrafluoroethylene) washer engineered for reliable sealing performance in HVAC and plumbing applications. PTFE is widely recognized in the trades for its exceptional chemical resistance, low friction, and ability to maintain a tight, leak-free seal across a broad range of operating temperatures and pressures.
Key Features
- 5/8″ diameter PTFE washer for precise fit in compatible fittings and connections
- PTFE construction offers outstanding chemical resistance to refrigerants, oils, and common HVAC fluids
- Low-friction material helps prevent galling and ensures easy installation
- Excellent temperature stability — PTFE performs reliably across a wide thermal range
- Provides a durable, leak-free seal to protect system integrity
- Suitable for use in HVAC, refrigeration, and plumbing sealing applications
- Mars quality construction for dependable, long-lasting performance
Applications
- HVAC system fittings and connections
- Refrigeration line sealing
- Plumbing connections requiring chemical-resistant gaskets
- General mechanical sealing where PTFE material is specified
Product Specifications
- Brand: Mars
- SKU: 43331
- Size: 5/8″
- Material: PTFE (Polytetrafluoroethylene)
- Type: Washer / Sealing Gasket







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