Value Collection ZMSCTST338 Ptfe O-ring Dash 338 10-pack

Product Description

The VALUE COLLECTION ZMSCTST338 is a Dash 338 O-ring made from polytetrafluoroethylene (PTFE), a high-performance fluoropolymer seal material suited for demanding fluid and gas sealing applications. This O-ring features a rectangle cross section with a 3.143-inch inside diameter, a 3.509-inch outside diameter, and a thickness of 0.0625 inches. It carries a durometer hardness rating of 55, placing it in the medium range. PTFE construction gives this seal a wide service temperature range of -65 to 500 degrees F, making it compatible with aggressive media where standard elastomers would degrade. Licensed plumbers, HVAC technicians, and industrial maintenance professionals are the primary installers.

This O-ring is used in static sealing applications across plumbing, hydraulic, pneumatic, and fluid processing systems where chemical resistance and thermal stability are required. The PTFE material resists oils, fuels, solvents, and many corrosive chemicals. The rectangle cross section provides consistent sealing contact in grooves designed for flat-profile seals. This item is sold in packages of 10, making it suitable for both single repairs and small-batch maintenance jobs.

Key Features

• PTFE material provides broad chemical resistance and wide temperature tolerance from -65 to 500 degrees F
• Rectangle cross section for consistent sealing in flat-groove applications
• Dash 338 standard sizing ensures compatibility with grooves specified to that dash number
• Medium hardness rating (55 durometer) balances compression set resistance and sealing force
• Inside diameter of 3.143 inches and outside diameter of 3.509 inches for precise fitment
• Packaged in quantities of 10 to support maintenance stock needs

Compatibility

Designed for use in static seal grooves dimensioned to the Dash 338 standard, with a 3.143-inch inside diameter and 0.0625-inch thickness, in plumbing, hydraulic, pneumatic, and fluid processing equipment requiring PTFE seals.

Installation Notes

Install by a qualified plumber, HVAC technician, or industrial maintenance mechanic following applicable system codes. Depressurize and isolate the system completely before removing the old seal or installing the new one. Ensure the groove dimensions match the Dash 338 profile before installation. PTFE O-rings do not require lubrication but ensure the groove is clean and free of burrs to avoid damage to the seal during assembly.