BS Silicone O-Rings

OneMonroe Silicone O-Rings offer a top-tier sealing solution designed to withstand a wide range of temperatures, chemicals, and environmental conditions. Made from premium silicone materials, these O-rings provide exceptional resilience and durability, making them suitable for various applications in industries such as aerospace, automotive, and medical. Whether you're seeking protection against extreme temperatures, moisture, or harsh chemicals, OneMonroe Silicone O-Rings deliver reliable performance, ensuring a secure and consistent seal in both static and dynamic applications.

Our silicone O-rings are engineered for optimal flexibility and compression, ensuring they maintain their shape and function under both high-stress and low-stress conditions. With an impressive temperature range and resistance to UV, ozone, and many chemicals, they are ideal for challenging environments that demand both strength and adaptability. Available in a range of sizes, our BS Silicone O-Rings offer versatile solutions for both standard and custom applications, ensuring you find the exact fit needed for your specific requirements. We manufacture each O-ring with precision, ensuring that each product meets the highest quality standards.

OneMonroe takes pride in providing reliable sealing solutions that enhance the safety and efficiency of your systems. Our silicone O-rings are carefully tested to ensure consistent quality and performance, providing you with a dependable sealing option that stands the test of time. With our commitment to quality and an extensive selection of sizes and specifications, OneMonroe Silicone O-Rings are the ideal choice for anyone looking to secure their equipment against leaks, contamination, or environmental wear. Choose OneMonroe for a sealing solution that meets your toughest demands and offers exceptional value in performance and durability.

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
BS356 S-70	N/A 186245	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 5.350 in135.89 mm	N/A 0.005 in0.13 mm	N/A -356
BS355 S-70	N/A 186246	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 5.225 in132.72 mm	N/A 0.005 in0.13 mm	N/A -355
BS354 S-70	N/A 186247	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 5.100 in129.54 mm	N/A 0.005 in0.13 mm	N/A -354
BS353 S-70	N/A 186248	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.975 in126.37 mm	N/A 0.005 in0.13 mm	N/A -353
BS352 S-70	N/A 186249	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.850 in123.19 mm	N/A 0.005 in0.13 mm	N/A -352
BS351 S-70	N/A 186250	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.725 in120.02 mm	N/A 0.005 in0.13 mm	N/A -351
BS350 S-70	N/A 186251	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.600 in116.84 mm	N/A 0.005 in0.13 mm	N/A -350
BS349 S-70	N/A 186252	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.475 in113.67 mm	N/A 0.005 in0.13 mm	N/A -349
BS348 S-70	N/A 186253	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.350 in110.49 mm	N/A 0.005 in0.13 mm	N/A -348
BS347 S-70	N/A 186254	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.225 in107.32 mm	N/A 0.005 in0.13 mm	N/A -347
BS346 S-70	N/A 186255	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 4.100 in104.14 mm	N/A 0.005 in0.13 mm	N/A -346
BS345 S-70	N/A 186256	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.975 in100.97 mm	N/A 0.005 in0.13 mm	N/A -345
BS344 S-70	N/A 186257	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.850 in97.79 mm	N/A 0.005 in0.13 mm	N/A -344
BS343 S-70	N/A 186258	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.725 in94.62 mm	N/A 0.005 in0.13 mm	N/A -343
BS342 S-70	N/A 186259	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.600 in91.44 mm	N/A 0.005 in0.13 mm	N/A -342
BS341 S-70	N/A 186260	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.475 in88.27 mm	N/A 0.005 in0.13 mm	N/A -341
BS340 S-70	N/A 186261	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.350 in85.09 mm	N/A 0.005 in0.13 mm	N/A -340
BS339 S-70	N/A 186262	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.225 in81.92 mm	N/A 0.005 in0.13 mm	N/A -339
BS338 S-70	N/A 186263	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 3.100 in78.74 mm	N/A 0.005 in0.13 mm	N/A -338
BS337 S-70	N/A 186264	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.975 in75.57 mm	N/A 0.005 in0.13 mm	N/A -337
BS336 S-70	N/A 186265	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.850 in72.39 mm	N/A 0.005 in0.13 mm	N/A -336
BS335 S-70	N/A 186266	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.725 in69.22 mm	N/A 0.005 in0.13 mm	N/A -335
BS334 S-70	N/A 186267	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.600 in66.04 mm	N/A 0.005 in0.13 mm	N/A -334
BS333 S-70	N/A 186268	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.475 in62.87 mm	N/A 0.005 in0.13 mm	N/A -333
BS332 S-70	N/A 186269	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 2.350 in59.69 mm	N/A 0.005 in0.13 mm	N/A -332

N/A
186245

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 5.350 in135.89 mm

N/A 0.005 in0.13 mm

N/A -356

BS355 S-70

N/A
186246

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 5.225 in132.72 mm

N/A 0.005 in0.13 mm

N/A -355

BS354 S-70

N/A
186247

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 5.100 in129.54 mm

N/A 0.005 in0.13 mm

N/A -354

BS353 S-70

N/A
186248

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.975 in126.37 mm

N/A 0.005 in0.13 mm

N/A -353

BS352 S-70

N/A
186249

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.850 in123.19 mm

N/A 0.005 in0.13 mm

N/A -352

BS351 S-70

N/A
186250

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.725 in120.02 mm

N/A 0.005 in0.13 mm

N/A -351

BS350 S-70

N/A
186251

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.600 in116.84 mm

N/A 0.005 in0.13 mm

N/A -350

BS349 S-70

N/A
186252

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.475 in113.67 mm

N/A 0.005 in0.13 mm

N/A -349

BS348 S-70

N/A
186253

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.350 in110.49 mm

N/A 0.005 in0.13 mm

N/A -348

BS347 S-70

N/A
186254

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.225 in107.32 mm

N/A 0.005 in0.13 mm

N/A -347

BS346 S-70

N/A
186255

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 4.100 in104.14 mm

N/A 0.005 in0.13 mm

N/A -346

BS345 S-70

N/A
186256

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.975 in100.97 mm

N/A 0.005 in0.13 mm

N/A -345

BS344 S-70

N/A
186257

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.850 in97.79 mm

N/A 0.005 in0.13 mm

N/A -344

BS343 S-70

N/A
186258

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.725 in94.62 mm

N/A 0.005 in0.13 mm

N/A -343

BS342 S-70

N/A
186259

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.600 in91.44 mm

N/A 0.005 in0.13 mm

N/A -342

BS341 S-70

N/A
186260

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.475 in88.27 mm

N/A 0.005 in0.13 mm

N/A -341

BS340 S-70

N/A
186261

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.350 in85.09 mm

N/A 0.005 in0.13 mm

N/A -340

BS339 S-70

N/A
186262

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.225 in81.92 mm

N/A 0.005 in0.13 mm

N/A -339

BS338 S-70

N/A
186263

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 3.100 in78.74 mm

N/A 0.005 in0.13 mm

N/A -338

BS337 S-70

N/A
186264

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.975 in75.57 mm

N/A 0.005 in0.13 mm

N/A -337

BS336 S-70

N/A
186265

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.850 in72.39 mm

N/A 0.005 in0.13 mm

N/A -336

BS335 S-70

N/A
186266

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.725 in69.22 mm

N/A 0.005 in0.13 mm

N/A -335

BS334 S-70

N/A
186267

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.600 in66.04 mm

N/A 0.005 in0.13 mm

N/A -334

BS333 S-70

N/A
186268

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.475 in62.87 mm

N/A 0.005 in0.13 mm

N/A -333

BS332 S-70

N/A
186269

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 2.350 in59.69 mm

N/A 0.005 in0.13 mm

N/A -332