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
BS279 S-70	N/A 186295	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 12.984 in329.79 mm	N/A 0.004 in0.10 mm	N/A -279
BS278 S-70	N/A 186296	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 11.984 in304.39 mm	N/A 0.004 in0.10 mm	N/A -278
BS277 S-70	N/A 186297	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 11.484 in291.69 mm	N/A 0.004 in0.10 mm	N/A -277
BS276 S-70	N/A 186298	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 10.984 in278.99 mm	N/A 0.004 in0.10 mm	N/A -276
BS275 S-70	N/A 186299	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 10.484 in266.29 mm	N/A 0.004 in0.10 mm	N/A -275
BS274 S-70	N/A 186300	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 9.984 in253.59 mm	N/A 0.004 in0.10 mm	N/A -274
BS273 S-70	N/A 186301	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 9.734 in247.24 mm	N/A 0.004 in0.10 mm	N/A -273
BS272 S-70	N/A 186302	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 9.484 in240.89 mm	N/A 0.004 in0.10 mm	N/A -272
BS271 S-70	N/A 186303	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 9.234 in234.54 mm	N/A 0.004 in0.10 mm	N/A -271
BS270 S-70	N/A 186304	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 8.984 in228.19 mm	N/A 0.004 in0.10 mm	N/A -270
BS269 S-70	N/A 186305	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 8.734 in221.84 mm	N/A 0.004 in0.10 mm	N/A -269
BS268 S-70	N/A 186306	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 8.484 in215.49 mm	N/A 0.004 in0.10 mm	N/A -268
BS267 S-70	N/A 186307	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 8.234 in209.14 mm	N/A 0.004 in0.10 mm	N/A -267
BS266 S-70	N/A 186308	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 7.984 in202.79 mm	N/A 0.004 in0.10 mm	N/A -266
BS265 S-70	N/A 186309	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 7.734 in196.44 mm	N/A 0.004 in0.10 mm	N/A -265
BS264 S-70	N/A 186310	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 7.484 in190.09 mm	N/A 0.004 in0.10 mm	N/A -264
BS263 S-70	N/A 186311	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 7.234 in183.74 mm	N/A 0.004 in0.10 mm	N/A -263
BS262 S-70	N/A 186312	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 6.984 in177.39 mm	N/A 0.004 in0.10 mm	N/A -262
BS261 S-70	N/A 186313	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 6.734 in171.04 mm	N/A 0.004 in0.10 mm	N/A -261
BS260 S-70	N/A 186314	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 6.484 in164.69 mm	N/A 0.004 in0.10 mm	N/A -260
BS259 S-70	N/A 186315	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 6.234 in158.34 mm	N/A 0.004 in0.10 mm	N/A -259
BS258 S-70	N/A 186316	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.984 in151.99 mm	N/A 0.004 in0.10 mm	N/A -258
BS257 S-70	N/A 186317	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.859 in148.82 mm	N/A 0.004 in0.10 mm	N/A -257
BS256 S-70	N/A 186318	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.734 in145.64 mm	N/A 0.004 in0.10 mm	N/A -256
BS255 S-70	N/A 186319	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.609 in142.47 mm	N/A 0.004 in0.10 mm	N/A -255

N/A
186295

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 12.984 in329.79 mm

N/A 0.004 in0.10 mm

N/A -279

BS278 S-70

N/A
186296

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 11.984 in304.39 mm

N/A 0.004 in0.10 mm

N/A -278

BS277 S-70

N/A
186297

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 11.484 in291.69 mm

N/A 0.004 in0.10 mm

N/A -277

BS276 S-70

N/A
186298

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 10.984 in278.99 mm

N/A 0.004 in0.10 mm

N/A -276

BS275 S-70

N/A
186299

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 10.484 in266.29 mm

N/A 0.004 in0.10 mm

N/A -275

BS274 S-70

N/A
186300

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 9.984 in253.59 mm

N/A 0.004 in0.10 mm

N/A -274

BS273 S-70

N/A
186301

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 9.734 in247.24 mm

N/A 0.004 in0.10 mm

N/A -273

BS272 S-70

N/A
186302

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 9.484 in240.89 mm

N/A 0.004 in0.10 mm

N/A -272

BS271 S-70

N/A
186303

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 9.234 in234.54 mm

N/A 0.004 in0.10 mm

N/A -271

BS270 S-70

N/A
186304

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 8.984 in228.19 mm

N/A 0.004 in0.10 mm

N/A -270

BS269 S-70

N/A
186305

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 8.734 in221.84 mm

N/A 0.004 in0.10 mm

N/A -269

BS268 S-70

N/A
186306

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 8.484 in215.49 mm

N/A 0.004 in0.10 mm

N/A -268

BS267 S-70

N/A
186307

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 8.234 in209.14 mm

N/A 0.004 in0.10 mm

N/A -267

BS266 S-70

N/A
186308

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 7.984 in202.79 mm

N/A 0.004 in0.10 mm

N/A -266

BS265 S-70

N/A
186309

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 7.734 in196.44 mm

N/A 0.004 in0.10 mm

N/A -265

BS264 S-70

N/A
186310

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 7.484 in190.09 mm

N/A 0.004 in0.10 mm

N/A -264

BS263 S-70

N/A
186311

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 7.234 in183.74 mm

N/A 0.004 in0.10 mm

N/A -263

BS262 S-70

N/A
186312

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 6.984 in177.39 mm

N/A 0.004 in0.10 mm

N/A -262

BS261 S-70

N/A
186313

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 6.734 in171.04 mm

N/A 0.004 in0.10 mm

N/A -261

BS260 S-70

N/A
186314

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 6.484 in164.69 mm

N/A 0.004 in0.10 mm

N/A -260

BS259 S-70

N/A
186315

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 6.234 in158.34 mm

N/A 0.004 in0.10 mm

N/A -259

BS258 S-70

N/A
186316

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.984 in151.99 mm

N/A 0.004 in0.10 mm

N/A -258

BS257 S-70

N/A
186317

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.859 in148.82 mm

N/A 0.004 in0.10 mm

N/A -257

BS256 S-70

N/A
186318

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.734 in145.64 mm

N/A 0.004 in0.10 mm

N/A -256

BS255 S-70

N/A
186319

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.609 in142.47 mm

N/A 0.004 in0.10 mm

N/A -255