Monroe
OneMonroe
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OneMonroe’s PTFE O-Rings are designed for applications demanding unparalleled chemical resistance, extreme temperature tolerance, and longevity. Crafted from high-quality PTFE (Polytetrafluoroethylene), these O-rings are well-suited for challenging environments that would compromise other materials. The AS568 standard sizing ensures compatibility across a wide range of applications, from industrial machinery to specialized equipment in chemical processing and food manufacturing. OneMonroe’s commitment to quality means that every PTFE O-ring offers a secure, leak-proof seal that withstands high pressures, making them indispensable for rigorous applications where performance and reliability are essential.

The unique properties of PTFE make these O-rings ideal for environments exposed to aggressive chemicals, solvents, and extreme temperatures. Unlike traditional rubber or elastomer O-rings, PTFE O-rings retain their integrity in high-temperature applications, withstanding ranges from -328°F to 500°F (-200°C to 260°C). This resilience ensures that the O-rings remain effective in sealing processes under the most demanding conditions. Additionally, PTFE’s non-stick properties mean these O-rings experience minimal friction and wear, which prolongs their lifespan and helps reduce maintenance downtime.

At OneMonroe, we understand that no two projects are identical, and our extensive inventory of AS568 PTFE O-rings provides a solution for nearly every industry need. Whether you’re working in aerospace, medical technology, or heavy-duty industrial applications, our PTFE O-rings offer reliable, long-lasting performance. We prioritize quality in every O-ring we produce, ensuring each piece delivers a precise fit and secure seal. With OneMonroe’s PTFE O-rings, you gain not only an exceptional product but also a partner committed to meeting the highest standards of excellence in sealing solutions.

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

AS568 Buna O-Rings
Unit of Measure
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Item #

IntegrationID

Cross Section Width

Durometer

Inside Diameter

Cross Section Tolerance +/-

Inside Diameter Tolerance +/-

Size Reference - AS568

Quantity
-373 PTFE N/A
195505 		N/A 0.210 in5.33 mm N/A N/A 227.97 mm8.975 in N/A 0.005 in0.12 mm N/A 0.050 in1.30 mm N/A -373
-374 PTFE N/A
195506 		N/A 0.210 in5.33 mm N/A N/A 234.32 mm9.225 in N/A 0.005 in0.12 mm N/A 0.055 in1.40 mm N/A -374
-375 PTFE N/A
195507 		N/A 0.210 in5.33 mm N/A N/A 240.67 mm9.475 in N/A 0.005 in0.12 mm N/A 0.055 in1.40 mm N/A -375
-376 PTFE N/A
195508 		N/A 0.210 in5.33 mm N/A N/A 247.02 mm9.725 in N/A 0.005 in0.12 mm N/A 0.055 in1.40 mm N/A -376
-377 PTFE N/A
195509 		N/A 0.210 in5.33 mm N/A N/A 253.37 mm9.975 in N/A 0.005 in0.12 mm N/A 0.055 in1.40 mm N/A -377
-378 PTFE N/A
195510 		N/A 0.210 in5.33 mm N/A N/A 266.07 mm10.475 in N/A 0.005 in0.12 mm N/A 0.060 in1.52 mm N/A -378
-379 PTFE N/A
195511 		N/A 0.210 in5.33 mm N/A N/A 278.77 mm10.975 in N/A 0.005 in0.12 mm N/A 0.060 in1.52 mm N/A -379
-380 PTFE N/A
195512 		N/A 0.210 in5.33 mm N/A N/A 291.47 mm11.475 in N/A 0.005 in0.12 mm N/A 0.065 in1.65 mm N/A -380
-381 PTFE N/A
195513 		N/A 0.210 in5.33 mm N/A N/A 304.17 mm11.975 in N/A 0.005 in0.12 mm N/A 0.065 in1.65 mm N/A -381
-382 PTFE N/A
195514 		N/A 0.210 in5.34 mm N/A N/A 329.55 mm12.975 in N/A 0.005 in0.12 mm N/A 0.065 in1.65 mm N/A -382
-383 PTFE N/A
195515 		N/A 0.210 in5.33 mm N/A N/A 354.97 mm13.975 in N/A 0.005 in0.12 mm N/A 0.070 in1.78 mm N/A -383
-384 PTFE N/A
195516 		N/A 0.210 in5.33 mm N/A N/A 380.37 mm14.975 in N/A 0.005 in0.12 mm N/A 0.070 in1.78 mm N/A -384
-385 PTFE N/A
195517 		N/A 0.210 in5.33 mm N/A N/A 405.26 mm15.955 in N/A 0.005 in0.12 mm N/A 0.075 in1.90 mm N/A -385
-386 PTFE N/A
195518 		N/A 0.210 in5.33 mm N/A N/A 430.66 mm16.955 in N/A 0.005 in0.12 mm N/A 0.080 in2.05 mm N/A -386
-387 PTFE N/A
195519 		N/A 0.210 in5.33 mm N/A N/A 456.06 mm17.955 in N/A 0.005 in0.12 mm N/A 0.085 in2.15 mm N/A -387
-388 PTFE N/A
195520 		N/A 0.210 in5.33 mm N/A N/A 481.46 mm18.955 in N/A 0.005 in0.12 mm N/A 0.090 in2.25 mm N/A -388
-389 PTFE N/A
195521 		N/A 0.210 in5.33 mm N/A N/A 506.86 mm19.955 in N/A 0.005 in0.12 mm N/A 0.095 in2.25 mm N/A -389
-390 PTFE N/A
195522 		N/A 0.210 in5.33 mm N/A N/A 532.26 mm20.955 in N/A 0.005 in0.12 mm N/A 0.095 in2.25 mm N/A -390
-391 PTFE N/A
195523 		N/A 0.210 in5.33 mm N/A N/A 557.66 mm21.955 in N/A 0.005 in0.12 mm N/A 0.100 in2.55 mm N/A -391
-392 PTFE N/A
195524 		N/A 0.210 in5.33 mm N/A N/A 582.65 mm22.940 in N/A 0.005 in0.12 mm N/A 0.105 in2.65 mm N/A -392
-393 PTFE N/A
195525 		N/A 0.210 in5.33 mm N/A N/A 608.10 mm23.940 in N/A 0.005 in0.12 mm N/A 0.110 in2.80 mm N/A -393
-394 PTFE N/A
195526 		N/A 0.210 in5.33 mm N/A N/A 633.50 mm24.940 in N/A 0.005 in0.12 mm N/A 0.115 in2.90 mm N/A -394
-395 PTFE N/A
195527 		N/A 0.210 in5.33 mm N/A N/A 658.88 mm25.940 in N/A 0.005 in0.12 mm N/A 0.012 in3.05 mm N/A -395
-400 PTFE N/A
195528 		N/A 0.275 in6.99 mm N/A N/A 34.29 mm1.350 in N/A 0.006 in0.15 mm N/A 0.015 in0.38 mm N/A -400
-401 PTFE N/A
195529 		N/A 0.275 in6.99 mm N/A N/A 37.47 mm1.475 in N/A 0.006 in0.15 mm N/A 0.015 in0.38 mm N/A -401
Unit of Measure
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