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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
-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
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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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

-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