Zoro Select O-Ring Silicone Red 3-1/4 in Dia PK5
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.
How it compares
Measured against everything we stock in Threadlockers & Sealants, at today’s prices. Recalculated every night.
- Price $17.99
- Pricier than about 83% of the 147 comparable items (median $11.99).
Specifications
| Product | |
|---|---|
| Brand name | ZORO 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.
More in Threadlockers & Sealants
