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
BS254 S-70	N/A 186320	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.484 in139.29 mm	N/A 0.004 in0.10 mm	N/A -254
BS253 S-70	N/A 186321	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.359 in136.12 mm	N/A 0.004 in0.10 mm	N/A -253
BS252 S-70	N/A 186322	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.234 in132.94 mm	N/A 0.004 in0.10 mm	N/A -252
BS251 S-70	N/A 186323	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 5.109 in129.77 mm	N/A 0.004 in0.10 mm	N/A -251
BS250 S-70	N/A 186324	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.984 in126.59 mm	N/A 0.004 in0.10 mm	N/A -250
BS249 S-70	N/A 186325	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.859 in123.42 mm	N/A 0.004 in0.10 mm	N/A -249
BS248 S-70	N/A 186326	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.734 in120.24 mm	N/A 0.004 in0.10 mm	N/A -248
BS247 S-70	N/A 186327	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.609 in117.07 mm	N/A 0.004 in0.10 mm	N/A -247
BS246 S-70	N/A 186328	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.484 in113.89 mm	N/A 0.004 in0.10 mm	N/A -246
BS245 S-70	N/A 186329	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.359 in110.72 mm	N/A 0.004 in0.10 mm	N/A -245
BS244 S-70	N/A 186330	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.234 in107.54 mm	N/A 0.004 in0.10 mm	N/A -244
BS243 S-70	N/A 186331	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 4.109 in104.37 mm	N/A 0.004 in0.10 mm	N/A -243
BS242 S-70	N/A 186332	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.984 in101.19 mm	N/A 0.004 in0.10 mm	N/A -242
BS241 S-70	N/A 186333	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.859 in98.02 mm	N/A 0.004 in0.10 mm	N/A -241
BS240 S-70	N/A 186334	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.734 in94.84 mm	N/A 0.004 in0.10 mm	N/A -240
BS239 S-70	N/A 186335	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.609 in91.67 mm	N/A 0.004 in0.10 mm	N/A -239
BS238 S-70	N/A 186336	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.484 in88.49 mm	N/A 0.004 in0.10 mm	N/A -238
BS237 S-70	N/A 186337	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.359 in85.32 mm	N/A 0.004 in0.10 mm	N/A -237
BS236 S-70	N/A 186338	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.234 in82.14 mm	N/A 0.004 in0.10 mm	N/A -236
BS235 S-70	N/A 186339	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 3.109 in78.97 mm	N/A 0.004 in0.10 mm	N/A -235
BS234 S-70	N/A 186340	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 2.984 in75.79 mm	N/A 0.004 in0.10 mm	N/A -234
BS233 S-70	N/A 186341	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 2.859 in72.62 mm	N/A 0.004 in0.10 mm	N/A -233
BS232 S-70	N/A 186342	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 2.734 in69.44 mm	N/A 0.004 in0.10 mm	N/A -232
BS231 S-70	N/A 186343	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 2.609 in66.27 mm	N/A 0.004 in0.10 mm	N/A -231
BS230 S-70	N/A 186344	N/A BS Standard O-Ring	N/A Silicone	N/A 0.139 in3.53 mm	N/A 70	N/A 2.484 in63.09 mm	N/A 0.004 in0.10 mm	N/A -230

N/A
186320

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.484 in139.29 mm

N/A 0.004 in0.10 mm

N/A -254

BS253 S-70

N/A
186321

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.359 in136.12 mm

N/A 0.004 in0.10 mm

N/A -253

BS252 S-70

N/A
186322

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.234 in132.94 mm

N/A 0.004 in0.10 mm

N/A -252

BS251 S-70

N/A
186323

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 5.109 in129.77 mm

N/A 0.004 in0.10 mm

N/A -251

BS250 S-70

N/A
186324

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.984 in126.59 mm

N/A 0.004 in0.10 mm

N/A -250

BS249 S-70

N/A
186325

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.859 in123.42 mm

N/A 0.004 in0.10 mm

N/A -249

BS248 S-70

N/A
186326

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.734 in120.24 mm

N/A 0.004 in0.10 mm

N/A -248

BS247 S-70

N/A
186327

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.609 in117.07 mm

N/A 0.004 in0.10 mm

N/A -247

BS246 S-70

N/A
186328

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.484 in113.89 mm

N/A 0.004 in0.10 mm

N/A -246

BS245 S-70

N/A
186329

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.359 in110.72 mm

N/A 0.004 in0.10 mm

N/A -245

BS244 S-70

N/A
186330

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.234 in107.54 mm

N/A 0.004 in0.10 mm

N/A -244

BS243 S-70

N/A
186331

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 4.109 in104.37 mm

N/A 0.004 in0.10 mm

N/A -243

BS242 S-70

N/A
186332

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.984 in101.19 mm

N/A 0.004 in0.10 mm

N/A -242

BS241 S-70

N/A
186333

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.859 in98.02 mm

N/A 0.004 in0.10 mm

N/A -241

BS240 S-70

N/A
186334

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.734 in94.84 mm

N/A 0.004 in0.10 mm

N/A -240

BS239 S-70

N/A
186335

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.609 in91.67 mm

N/A 0.004 in0.10 mm

N/A -239

BS238 S-70

N/A
186336

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.484 in88.49 mm

N/A 0.004 in0.10 mm

N/A -238

BS237 S-70

N/A
186337

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.359 in85.32 mm

N/A 0.004 in0.10 mm

N/A -237

BS236 S-70

N/A
186338

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.234 in82.14 mm

N/A 0.004 in0.10 mm

N/A -236

BS235 S-70

N/A
186339

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 3.109 in78.97 mm

N/A 0.004 in0.10 mm

N/A -235

BS234 S-70

N/A
186340

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 2.984 in75.79 mm

N/A 0.004 in0.10 mm

N/A -234

BS233 S-70

N/A
186341

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 2.859 in72.62 mm

N/A 0.004 in0.10 mm

N/A -233

BS232 S-70

N/A
186342

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 2.734 in69.44 mm

N/A 0.004 in0.10 mm

N/A -232

BS231 S-70

N/A
186343

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 2.609 in66.27 mm

N/A 0.004 in0.10 mm

N/A -231

BS230 S-70

N/A
186344

N/A BS Standard O-Ring

N/A Silicone

N/A 0.139 in3.53 mm

N/A 70

N/A 2.484 in63.09 mm

N/A 0.004 in0.10 mm

N/A -230