AS568 PTFE O-Rings

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.

Item #	IntegrationID	Cross Section Width	Durometer	Inside Diameter	Cross Section Tolerance +/-	Inside Diameter Tolerance +/-	Size Reference - AS568	Product Guides
-177 PTFE	N/A 195355	N/A 0.103 in2.62 mm	N/A	N/A 240.97 mm9.487 in	N/A 0.003 in0.08 mm	N/A 0.055 in1.40 mm	N/A -177	N/A Seal Guides
-178 PTFE	N/A 195356	N/A 0.103 in2.62 mm	N/A	N/A 247.32 mm9.737 in	N/A 0.003 in0.08 mm	N/A 0.055 in1.40 mm	N/A -178	N/A Seal Guides
-201 PTFE	N/A 195357	N/A 0.139 in3.53 mm	N/A	N/A 4.34 mm0.171 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -201	N/A Seal Guides
-202 PTFE	N/A 195358	N/A 0.139 in3.53 mm	N/A	N/A 5.94 mm0.234 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -202	N/A Seal Guides
-203 PTFE	N/A 195359	N/A 0.139 in3.53 mm	N/A	N/A 7.52 mm0.296 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -203	N/A Seal Guides
-204 PTFE	N/A 195360	N/A 0.139 in3.53 mm	N/A	N/A 9.12 mm0.359 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -204	N/A Seal Guides
-205 PTFE	N/A 195361	N/A 0.139 in3.53 mm	N/A	N/A 10.69 mm0.421 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -205	N/A Seal Guides
-206 PTFE	N/A 195362	N/A 0.139 in3.53 mm	N/A	N/A 12.29 mm0.484 in	N/A 0.004 in0.10 mm	N/A 0.005 in0.12 mm	N/A -206	N/A Seal Guides
-207 PTFE	N/A 195363	N/A 0.139 in3.53 mm	N/A	N/A 13.87 mm0.546 in	N/A 0.004 in0.10 mm	N/A 0.007 in0.17 mm	N/A -207	N/A Seal Guides
-208 PTFE	N/A 195364	N/A 0.139 in3.53 mm	N/A	N/A 15.47 mm0.609 in	N/A 0.004 in0.10 mm	N/A 0.009 in0.23 mm	N/A -208	N/A Seal Guides
-209 PTFE	N/A 195365	N/A 0.139 in3.53 mm	N/A	N/A 17.04 mm0.671 in	N/A 0.004 in0.10 mm	N/A 0.009 in0.23 mm	N/A -209	N/A Seal Guides
-210 PTFE	N/A 195366	N/A 0.139 in3.53 mm	N/A	N/A 18.64 mm0.734 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -210	N/A Seal Guides
-211 PTFE	N/A 195367	N/A 0.139 in3.53 mm	N/A	N/A 20.22 mm0.796 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -211	N/A Seal Guides
-212 PTFE	N/A 195368	N/A 0.139 in3.53 mm	N/A	N/A 21.82 mm0.859 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -212	N/A Seal Guides
-213 PTFE	N/A 195369	N/A 0.139 in3.53 mm	N/A	N/A 23.39 mm0.921 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -213	N/A Seal Guides
-214 PTFE	N/A 195370	N/A 0.139 in3.53 mm	N/A	N/A 24.99 mm0.984 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -214	N/A Seal Guides
-215 PTFE	N/A 195371	N/A 0.139 in3.53 mm	N/A	N/A 26.57 mm1.046 in	N/A 0.004 in0.10 mm	N/A 0.010 in0.25 mm	N/A -215	N/A Seal Guides
-216 PTFE	N/A 195372	N/A 0.139 in3.53 mm	N/A	N/A 28.17 mm1.109 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -216	N/A Seal Guides
-217 PTFE	N/A 195373	N/A 0.139 in3.53 mm	N/A	N/A 29.74 mm1.171 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -217	N/A Seal Guides
-218 PTFE	N/A 195374	N/A 0.139 in3.53 mm	N/A	N/A 31.34 mm1.234 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -218	N/A Seal Guides
-219 PTFE	N/A 195375	N/A 0.139 in3.53 mm	N/A	N/A 32.92 mm1.296 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -219	N/A Seal Guides
-220 PTFE	N/A 195376	N/A 0.139 in3.53 mm	N/A	N/A 34.52 mm1.359 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -220	N/A Seal Guides
-221 PTFE	N/A 195377	N/A 0.139 in3.53 mm	N/A	N/A 36.09 mm1.421 in	N/A 0.004 in0.10 mm	N/A 0.012 in0.30 mm	N/A -221	N/A Seal Guides
-222 PTFE	N/A 195378	N/A 0.139 in3.53 mm	N/A	N/A 37.69 mm1.484 in	N/A 0.004 in0.10 mm	N/A 0.015 in0.38 mm	N/A -222	N/A Seal Guides
-223 PTFE	N/A 195379	N/A 0.139 in3.53 mm	N/A	N/A 40.87 mm1.609 in	N/A 0.004 in0.10 mm	N/A 0.015 in0.38 mm	N/A -223	N/A Seal Guides

N/A
195355

N/A 0.103 in2.62 mm

N/A

N/A 240.97 mm9.487 in

N/A 0.003 in0.08 mm

N/A 0.055 in1.40 mm

N/A -177

N/A Seal Guides

-178 PTFE

N/A
195356

N/A 0.103 in2.62 mm

N/A

N/A 247.32 mm9.737 in

N/A 0.003 in0.08 mm

N/A 0.055 in1.40 mm

N/A -178

N/A Seal Guides

-201 PTFE

N/A
195357

N/A 0.139 in3.53 mm

N/A

N/A 4.34 mm0.171 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -201

N/A Seal Guides

-202 PTFE

N/A
195358

N/A 0.139 in3.53 mm

N/A

N/A 5.94 mm0.234 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -202

N/A Seal Guides

-203 PTFE

N/A
195359

N/A 0.139 in3.53 mm

N/A

N/A 7.52 mm0.296 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -203

N/A Seal Guides

-204 PTFE

N/A
195360

N/A 0.139 in3.53 mm

N/A

N/A 9.12 mm0.359 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -204

N/A Seal Guides

-205 PTFE

N/A
195361

N/A 0.139 in3.53 mm

N/A

N/A 10.69 mm0.421 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -205

N/A Seal Guides

-206 PTFE

N/A
195362

N/A 0.139 in3.53 mm

N/A

N/A 12.29 mm0.484 in

N/A 0.004 in0.10 mm

N/A 0.005 in0.12 mm

N/A -206

N/A Seal Guides

-207 PTFE

N/A
195363

N/A 0.139 in3.53 mm

N/A

N/A 13.87 mm0.546 in

N/A 0.004 in0.10 mm

N/A 0.007 in0.17 mm

N/A -207

N/A Seal Guides

-208 PTFE

N/A
195364

N/A 0.139 in3.53 mm

N/A

N/A 15.47 mm0.609 in

N/A 0.004 in0.10 mm

N/A 0.009 in0.23 mm

N/A -208

N/A Seal Guides

-209 PTFE

N/A
195365

N/A 0.139 in3.53 mm

N/A

N/A 17.04 mm0.671 in

N/A 0.004 in0.10 mm

N/A 0.009 in0.23 mm

N/A -209

N/A Seal Guides

-210 PTFE

N/A
195366

N/A 0.139 in3.53 mm

N/A

N/A 18.64 mm0.734 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -210

N/A Seal Guides

-211 PTFE

N/A
195367

N/A 0.139 in3.53 mm

N/A

N/A 20.22 mm0.796 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -211

N/A Seal Guides

-212 PTFE

N/A
195368

N/A 0.139 in3.53 mm

N/A

N/A 21.82 mm0.859 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -212

N/A Seal Guides

-213 PTFE

N/A
195369

N/A 0.139 in3.53 mm

N/A

N/A 23.39 mm0.921 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -213

N/A Seal Guides

-214 PTFE

N/A
195370

N/A 0.139 in3.53 mm

N/A

N/A 24.99 mm0.984 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -214

N/A Seal Guides

-215 PTFE

N/A
195371

N/A 0.139 in3.53 mm

N/A

N/A 26.57 mm1.046 in

N/A 0.004 in0.10 mm

N/A 0.010 in0.25 mm

N/A -215

N/A Seal Guides

-216 PTFE

N/A
195372

N/A 0.139 in3.53 mm

N/A

N/A 28.17 mm1.109 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -216

N/A Seal Guides

-217 PTFE

N/A
195373

N/A 0.139 in3.53 mm

N/A

N/A 29.74 mm1.171 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -217

N/A Seal Guides

-218 PTFE

N/A
195374

N/A 0.139 in3.53 mm

N/A

N/A 31.34 mm1.234 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -218

N/A Seal Guides

-219 PTFE

N/A
195375

N/A 0.139 in3.53 mm

N/A

N/A 32.92 mm1.296 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -219

N/A Seal Guides

-220 PTFE

N/A
195376

N/A 0.139 in3.53 mm

N/A

N/A 34.52 mm1.359 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -220

N/A Seal Guides

-221 PTFE

N/A
195377

N/A 0.139 in3.53 mm

N/A

N/A 36.09 mm1.421 in

N/A 0.004 in0.10 mm

N/A 0.012 in0.30 mm

N/A -221

N/A Seal Guides

-222 PTFE

N/A
195378

N/A 0.139 in3.53 mm

N/A

N/A 37.69 mm1.484 in

N/A 0.004 in0.10 mm

N/A 0.015 in0.38 mm

N/A -222

N/A Seal Guides

-223 PTFE

N/A
195379

N/A 0.139 in3.53 mm

N/A

N/A 40.87 mm1.609 in

N/A 0.004 in0.10 mm

N/A 0.015 in0.38 mm

N/A -223

N/A Seal Guides