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Five red silicone O-rings 3-1/4 inch diameter round cross section

Zoro Select

Zoro Select O-Ring Silicone Red 3-1/4 in Dia PK5

SKU CH-C5JP-S8MME

Red silicone O-ring kit rated for -80 °F to 450 °F with 3.2 in inside diameter and 0.139 in cross section, five per pack

  • Metal-detectable silicone meets 3A 18-03 and FDA standards
  • Temperature range from -80 to 450 degrees Fahrenheit
  • Medium-hard 50A durometer resists extrusion under pressure
  • Exact 3.2 inch inside diameter and 0.139 inch width for precise fit
  • Pack of five red O-rings simplifies maintenance inventory

Zoro Select Silicone O-Ring 3-1/4 in

This pack contains five red silicone O-rings with a 3-1/4 inch nominal inside diameter and a 1/8 inch nominal width. They are made from medium-hard 50A durometer material and meet FDA and 3A 18-03 standards for food and sanitary contact. The rings operate across a broad temperature range from -80 to 450 degrees Fahrenheit.

Suits sanitary and food-grade sealing tasks

These rings fit machinery needing metal-detectable seals that comply with 3A and FDA rules. They are not X-ray detectable, so processes relying on X-ray inspection for foreign-object detection should consider other options. The silicone material also limits use with certain aggressive solvents or fuels.

Critical spec: 3.2 inch actual inside diameter

The actual inside diameter measures 3.2 inches with a 0.139 inch actual width, corresponding to dash number 236. Verify these exact dimensions against your groove specifications before ordering, as the nominal 3-1/4 inch size is only a reference.

Highlights

  • Metal-detectable silicone meets 3A 18-03 and FDA standards
  • Temperature range from -80 to 450 degrees Fahrenheit
  • Medium-hard 50A durometer resists extrusion under pressure
  • Exact 3.2 inch inside diameter and 0.139 inch width for precise fit
  • Pack of five red O-rings simplifies maintenance inventory

Specifications

BrandZORO SELECT

Questions about this item

What groove dimensions do I need for the 3.2 in inside diameter and .139 in cross-section?

Machine a groove that matches the 3.2 in actual inside diameter and .139 in actual width so the 236 dash-size ring seats correctly.

Will the 50A durometer silicone seal against older metal flanges that have minor surface wear?

The medium-hard 50A durometer conforms to slight imperfections while maintaining a reliable seal across the -80 to 450 °F range.

How can I verify the red silicone rings meet the 3A 18-03 and FDA standards after installation?

Check for the permanent red colour code and confirm the metal-detectable property with a standard inline detector; both indicate compliance.

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