Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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OneMonroe PTFE O-Rings provide an exceptional sealing solution for demanding applications where standard rubber or elastomer rings may fall short. These high-quality O-Rings are made from PTFE (polytetrafluoroethylene), a versatile and durable material known for its remarkable resistance to high temperatures, chemicals, and extreme environmental conditions. PTFE O-Rings offer superior performance in harsh industrial settings, such as chemical processing, oil and gas, and food manufacturing, where contamination-free, leak-proof seals are essential. OneMonroe’s PTFE O-Rings are designed to maintain their integrity under extreme pressure, making them an optimal choice for businesses that prioritize reliable, long-lasting components.

Available in a range of sizes to fit various BS specifications, OneMonroe’s PTFE O-Rings are engineered to meet the unique demands of high-temperature and corrosive applications. Unlike traditional O-Rings, PTFE O-Rings are non-reactive and highly resistant to a wide range of chemicals, including acids, bases, and solvents, allowing them to deliver top-notch performance where rubber O-Rings might degrade. The PTFE material also boasts a low coefficient of friction, which minimizes wear and tear on both the O-Ring and surrounding components. This means less downtime and fewer replacements, translating to cost savings and increased operational efficiency for your business.

OneMonroe is committed to providing products that offer exceptional durability and performance in even the most challenging environments. Each PTFE O-Ring is precision-manufactured and quality-checked to meet stringent industry standards, ensuring you receive a reliable product every time. Whether you’re working in an industrial, automotive, or medical setting, OneMonroe PTFE O-Rings are designed to handle the job with unmatched resilience and durability. Trust OneMonroe’s dedication to quality and performance, and let our PTFE O-Rings help keep your operations running smoothly and securely.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Inside Diameter

CSW Tolerance

BS Number

Quantity
BS356 PTFE N/A
189486 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 5.350 in135.89 mm N/A 0.005 in0.13 mm N/A -356
BS355 PTFE N/A
189487 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 5.225 in132.72 mm N/A 0.005 in0.13 mm N/A -355
BS354 PTFE N/A
189488 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 5.100 in129.54 mm N/A 0.005 in0.13 mm N/A -354
BS353 PTFE N/A
189489 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.975 in126.37 mm N/A 0.005 in0.13 mm N/A -353
BS352 PTFE N/A
189490 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.850 in123.19 mm N/A 0.005 in0.13 mm N/A -352
BS351 PTFE N/A
189491 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.725 in120.02 mm N/A 0.005 in0.13 mm N/A -351
BS350 PTFE N/A
189492 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.6 in116.84 mm N/A 0.005 in0.13 mm N/A -350
BS349 PTFE N/A
189493 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.475 in113.67 mm N/A 0.005 in0.13 mm N/A -349
BS348 PTFE N/A
189494 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.350 in110.49 mm N/A 0.005 in0.13 mm N/A -348
BS347 PTFE N/A
189495 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.225 in107.32 mm N/A 0.005 in0.13 mm N/A -347
BS346 PTFE N/A
189496 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 4.100 in104.14 mm N/A 0.005 in0.13 mm N/A -346
BS345 PTFE N/A
189497 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.975 in100.97 mm N/A 0.005 in0.13 mm N/A -345
BS344 PTFE N/A
189498 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.850 in97.79 mm N/A 0.005 in0.13 mm N/A -344
BS343 PTFE N/A
189499 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.725 in94.62 mm N/A 0.005 in0.13 mm N/A -343
BS342 PTFE N/A
189500 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.75 in91.44 mm N/A 0.005 in0.13 mm N/A -342
BS341 PTFE N/A
189501 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.475 in88.27 mm N/A 0.005 in0.13 mm N/A -341
BS340 PTFE N/A
189502 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.350 in85.09 mm N/A 0.005 in0.13 mm N/A -340
BS339 PTFE N/A
189503 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.225 in81.92 mm N/A 0.005 in0.13 mm N/A -339
BS338 PTFE N/A
189504 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 3.100 in78.74 mm N/A 0.005 in0.13 mm N/A -338
BS337 PTFE N/A
189505 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.975 in75.57 mm N/A 0.005 in0.13 mm N/A -337
BS336 PTFE N/A
189506 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.850 in72.39 mm N/A 0.005 in0.13 mm N/A -336
BS335 PTFE N/A
189507 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.725 in69.22 mm N/A 0.005 in0.13 mm N/A -335
BS334 PTFE N/A
189508 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.75 in66.04 mm N/A 0.005 in0.13 mm N/A -334
BS333 PTFE N/A
189509 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.475 in62.87 mm N/A 0.005 in0.13 mm N/A -333
BS332 PTFE N/A
189510 		N/A BS Standard O-Ring N/A PTFE N/A 0.210 in5.33 mm N/A 2.350 in59.69 mm N/A 0.005 in0.13 mm N/A -332
Unit of Measure
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