BS Aflas O-Rings | OneMonroe

OneMonroe Aflas® O-Rings offer exceptional durability and resistance, engineered for high-performance applications where standard elastomers fall short. Made from Aflas® material, these O-rings are specifically designed to withstand challenging environments with extreme temperatures, chemicals, and aggressive fluids. Their outstanding resilience against oil, steam, acids, and alkalis makes them ideal for industries such as chemical processing, oil and gas, and automotive manufacturing, where exposure to such conditions is common. OneMonroe Aflas® O-Rings provide a reliable sealing solution that maintains its integrity and performance even in the most demanding applications.

The versatility of Aflas® material allows OneMonroe O-Rings to perform exceptionally in both high- and low-temperature ranges, ranging from -10°C to 200°C (14°F to 392°F). This unique thermal resistance ensures that these O-rings can be used effectively across a wide spectrum of applications, minimizing the need for frequent replacements and maintenance. In addition to temperature resilience, Aflas® O-Rings resist a variety of chemicals and fluids, including amines, bases, acids, and hydrocarbons. Their durability and adaptability make them a cost-effective choice for industries that demand long-lasting, reliable sealing solutions under extreme conditions.

OneMonroe’s commitment to quality ensures that each Aflas® O-Ring is manufactured with precision to meet rigorous industry standards. Available in a range of sizes and thicknesses, these O-rings offer flexibility in design while maintaining consistent, dependable sealing performance. With OneMonroe Aflas® O-Rings, you can be assured of high-quality components that deliver long-term reliability, reduce downtime, and support seamless operations across industries. Trust in OneMonroe to provide O-rings that uphold the highest standards in durability, chemical resistance, and thermal stability for all your specialized sealing needs.

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

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	BS Number
BS267 AFLAS-83	N/A 187233	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 8.23 in209.14 mm	N/A 0.004 in0.10 mm	N/A -267
BS266 AFLAS-83	N/A 187234	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 7.98 in202.79 mm	N/A 0.004 in0.10 mm	N/A -266
BS265 AFLAS-83	N/A 187235	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 7.73 in196.44 mm	N/A 0.004 in0.10 mm	N/A -265
BS264 AFLAS-83	N/A 187236	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 7.48 in190.09 mm	N/A 0.004 in0.10 mm	N/A -264
BS263 AFLAS-83	N/A 187237	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 7.23 in183.74 mm	N/A 0.004 in0.10 mm	N/A -263
BS262 AFLAS-83	N/A 187238	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 6.98 in177.39 mm	N/A 0.004 in0.10 mm	N/A -262
BS261 AFLAS-83	N/A 187239	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 6.73 in171.04 mm	N/A 0.004 in0.10 mm	N/A -261
BS275 AFLAS-83	N/A 187240	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 6.48 in164.69 mm	N/A 0.004 in0.10 mm	N/A -275
BS259 AFLAS-83	N/A 187241	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 6.23 in158.34 mm	N/A 0.004 in0.10 mm	N/A -259
BS258 AFLAS-83	N/A 187242	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.98 in151.99 mm	N/A 0.004 in0.10 mm	N/A -258
BS257 AFLAS-83	N/A 187243	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.86 in148.82 mm	N/A 0.004 in0.10 mm	N/A -257
BS256 AFLAS-83	N/A 187244	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.73 in145.64 mm	N/A 0.004 in0.10 mm	N/A -256
BS255 AFLAS-83	N/A 187245	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.61 in142.47 mm	N/A 0.004 in0.10 mm	N/A -255
BS254 AFLAS-83	N/A 187246	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.48 in139.29 mm	N/A 0.004 in0.10 mm	N/A -254
BS253 AFLAS-83	N/A 187247	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.36 in136.12 mm	N/A 0.004 in0.10 mm	N/A -253
BS252 AFLAS-83	N/A 187248	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.23 in132.94 mm	N/A 0.004 in0.10 mm	N/A -252
BS251 AFLAS-83	N/A 187249	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 5.11 in129.77 mm	N/A 0.004 in0.10 mm	N/A -251
BS250 AFLAS-83	N/A 187250	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.98 in126.59 mm	N/A 0.004 in0.10 mm	N/A -250
BS249 AFLAS-83	N/A 187251	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.86 in123.42 mm	N/A 0.004 in0.10 mm	N/A -249
BS248 AFLAS-83	N/A 187252	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.73 in120.24 mm	N/A 0.004 in0.10 mm	N/A -248
BS247 AFLAS-83	N/A 187253	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.61 in117.07 mm	N/A 0.004 in0.10 mm	N/A -247
BS246 AFLAS-83	N/A 187254	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.48 in113.89 mm	N/A 0.004 in0.10 mm	N/A -246
BS245 AFLAS-83	N/A 187255	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.36 in110.72 mm	N/A 0.004 in0.10 mm	N/A -245
BS244 AFLAS-83	N/A 187256	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.23 in107.54 mm	N/A 0.004 in0.10 mm	N/A -244
BS243 AFLAS-83	N/A 187257	N/A BS Standard O-Ring	N/A Aflas	N/A 0.139 in3.53 mm	N/A 83	N/A 4.11 in104.37 mm	N/A 0.004 in0.10 mm	N/A -243

N/A
187233

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 8.23 in209.14 mm

N/A 0.004 in0.10 mm

N/A -267

BS266 AFLAS-83

N/A
187234

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 7.98 in202.79 mm

N/A 0.004 in0.10 mm

N/A -266

BS265 AFLAS-83

N/A
187235

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 7.73 in196.44 mm

N/A 0.004 in0.10 mm

N/A -265

BS264 AFLAS-83

N/A
187236

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 7.48 in190.09 mm

N/A 0.004 in0.10 mm

N/A -264

BS263 AFLAS-83

N/A
187237

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 7.23 in183.74 mm

N/A 0.004 in0.10 mm

N/A -263

BS262 AFLAS-83

N/A
187238

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 6.98 in177.39 mm

N/A 0.004 in0.10 mm

N/A -262

BS261 AFLAS-83

N/A
187239

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 6.73 in171.04 mm

N/A 0.004 in0.10 mm

N/A -261

BS275 AFLAS-83

N/A
187240

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 6.48 in164.69 mm

N/A 0.004 in0.10 mm

N/A -275

BS259 AFLAS-83

N/A
187241

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 6.23 in158.34 mm

N/A 0.004 in0.10 mm

N/A -259

BS258 AFLAS-83

N/A
187242

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.98 in151.99 mm

N/A 0.004 in0.10 mm

N/A -258

BS257 AFLAS-83

N/A
187243

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.86 in148.82 mm

N/A 0.004 in0.10 mm

N/A -257

BS256 AFLAS-83

N/A
187244

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.73 in145.64 mm

N/A 0.004 in0.10 mm

N/A -256

BS255 AFLAS-83

N/A
187245

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.61 in142.47 mm

N/A 0.004 in0.10 mm

N/A -255

BS254 AFLAS-83

N/A
187246

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.48 in139.29 mm

N/A 0.004 in0.10 mm

N/A -254

BS253 AFLAS-83

N/A
187247

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.36 in136.12 mm

N/A 0.004 in0.10 mm

N/A -253

BS252 AFLAS-83

N/A
187248

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.23 in132.94 mm

N/A 0.004 in0.10 mm

N/A -252

BS251 AFLAS-83

N/A
187249

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 5.11 in129.77 mm

N/A 0.004 in0.10 mm

N/A -251

BS250 AFLAS-83

N/A
187250

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.98 in126.59 mm

N/A 0.004 in0.10 mm

N/A -250

BS249 AFLAS-83

N/A
187251

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.86 in123.42 mm

N/A 0.004 in0.10 mm

N/A -249

BS248 AFLAS-83

N/A
187252

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.73 in120.24 mm

N/A 0.004 in0.10 mm

N/A -248

BS247 AFLAS-83

N/A
187253

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.61 in117.07 mm

N/A 0.004 in0.10 mm

N/A -247

BS246 AFLAS-83

N/A
187254

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.48 in113.89 mm

N/A 0.004 in0.10 mm

N/A -246

BS245 AFLAS-83

N/A
187255

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.36 in110.72 mm

N/A 0.004 in0.10 mm

N/A -245

BS244 AFLAS-83

N/A
187256

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.23 in107.54 mm

N/A 0.004 in0.10 mm

N/A -244

BS243 AFLAS-83

N/A
187257

N/A BS Standard O-Ring

N/A Aflas

N/A 0.139 in3.53 mm

N/A 83

N/A 4.11 in104.37 mm

N/A 0.004 in0.10 mm

N/A -243