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Two brown Viton O-rings, 4-1/2 inch inside diameter, 3/16 inch cross-section

Zoro Select

Zoro Select O-Ring 4-1/2 in Viton Brown PK2

SKU CH-29EQ-8Y1ME

Pack of two Viton O-rings rated from -15 °F to 400 °F with FDA approval

  • Viton material withstands -15 °F to 400 °F
  • FDA-approved compound suits food-contact applications
  • Metal-detectable design aids contamination control
  • 4 in actual inside diameter fits 4-1/2 in nominal bores
  • Pack of two provides ready spare

Viton O-Ring for High-Temperature Seals

This pack contains two brown Viton O-rings designed for static sealing in demanding fluid systems. The material handles a continuous temperature range from minus fifteen to four hundred degrees Fahrenheit. It suits maintenance engineers and plant operators who need reliable chemical resistance in hydraulic or pneumatic circuits.

4-1/2 Inch Nominal Diameter

The rings have a nominal inside diameter of four and a half inches and a nominal width of three sixteenths of an inch. Actual inside diameter measures 4.4 inches while actual width is 0.21 inches, giving a dash number of 349. This size fits standard grooves calling for the 349 dash series but will not seal larger or smaller bores.

Medium-Hard 75A Durometer with FDA Approval

The Viton compound carries a 75A durometer rating for medium-hard resilience against extrusion. Units are FDA approved and metal detectable for food or pharmaceutical lines, though they are not X-ray detectable. California Proposition 65 warning applies because the material contains a listed reproductive-hazard chemical.

Highlights

  • Viton material withstands -15 °F to 400 °F
  • FDA-approved compound suits food-contact applications
  • Metal-detectable design aids contamination control
  • 4 in actual inside diameter fits 4-1/2 in nominal bores
  • Pack of two provides ready spare

Specifications

BrandZORO SELECT

Questions about this item

Will the 4.4 in actual inside diameter match the groove on my existing 4-1/2 in nominal flange?

The nominal inside diameter is 4-1/2 in and the actual inside diameter is 4.4 in, so verify your groove dimensions against the 4.4 in figure before installation.

How can I confirm the Viton 75A durometer is sealing correctly after installation?

Pressurise the system within the -15 to 400 °F range and check for leaks; a proper seal will hold pressure without weeping at the 0.21 in actual width.

Does the PK2 pack include any lubricant or installation tools, or must I buy them separately?

The pack contains two brown Viton O-rings only; lubricant and installation tools are not included and must be purchased separately.

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