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	Product Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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	N/A Seal Guides
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 Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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

N/A Seal Guides

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 Seal Guides