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
BS435 S-70	N/A 186195	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.725 in145.42 mm	N/A 0.006 in0.15 mm	N/A -435
BS434 S-70	N/A 186196	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.600 in142.24 mm	N/A 0.006 in0.15 mm	N/A -434
BS433 S-70	N/A 186197	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.475 in139.07 mm	N/A 0.006 in0.15 mm	N/A -433
BS432 S-70	N/A 186198	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.350 in135.89 mm	N/A 0.006 in0.15 mm	N/A -432
BS431 S-70	N/A 186199	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.225 in132.72 mm	N/A 0.006 in0.15 mm	N/A -431
BS430 S-70	N/A 186200	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 5.100 in129.54 mm	N/A 0.006 in0.15 mm	N/A -430
BS429 S-70	N/A 186201	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 4.975 in126.37 mm	N/A 0.006 in0.15 mm	N/A -429
BS428 S-70	N/A 186202	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 4.850 in123.19 mm	N/A 0.006 in0.15 mm	N/A -428
BS427 S-70	N/A 186203	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 4.725 in120.02 mm	N/A 0.006 in0.15 mm	N/A -427
BS426 S-70	N/A 186204	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 4.600 in116.84 mm	N/A 0.006 in0.15 mm	N/A -426
BS425 S-70	N/A 186205	N/A BS Standard O-Ring	N/A Silicone	N/A 0.275 in6.99 mm	N/A 70	N/A 4.475 in113.67 mm	N/A 0.006 in0.15 mm	N/A -425
BS395 S-70	N/A 186206	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 25.940 in658.88 mm	N/A 0.005 in0.13 mm	N/A -395
BS394 S-70	N/A 186207	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 24.940 in633.48 mm	N/A 0.005 in0.13 mm	N/A -394
BS393 S-70	N/A 186208	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 23.940 in608.08 mm	N/A 0.005 in0.13 mm	N/A -393
BS392 S-70	N/A 186209	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 22.940 in582.68 mm	N/A 0.005 in0.13 mm	N/A -392
BS391 S-70	N/A 186210	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 21.955 in557.66 mm	N/A 0.005 in0.13 mm	N/A -391
BS390 S-70	N/A 186211	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 20.955 in532.26 mm	N/A 0.005 in0.13 mm	N/A -390
BS389 S-70	N/A 186212	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 19.955 in506.86 mm	N/A 0.005 in0.13 mm	N/A -389
BS388 S-70	N/A 186213	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 18.955 in481.46 mm	N/A 0.005 in0.13 mm	N/A -388
BS387 S-70	N/A 186214	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 17.955 in456.06 mm	N/A 0.005 in0.13 mm	N/A -387
BS386 S-70	N/A 186215	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 16.955 in430.66 mm	N/A 0.005 in0.13 mm	N/A -386
BS385 S-70	N/A 186216	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 15.955 in405.26 mm	N/A 0.005 in0.13 mm	N/A -385
BS384 S-70	N/A 186217	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 14.975 in380.37 mm	N/A 0.005 in0.13 mm	N/A -384
BS383 S-70	N/A 186218	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 13.975 in354.97 mm	N/A 0.005 in0.13 mm	N/A -383
BS382 S-70	N/A 186219	N/A BS Standard O-Ring	N/A Silicone	N/A 0.210 in5.33 mm	N/A 70	N/A 12.975 in329.57 mm	N/A 0.005 in0.13 mm	N/A -382

N/A
186195

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.725 in145.42 mm

N/A 0.006 in0.15 mm

N/A -435

BS434 S-70

N/A
186196

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.600 in142.24 mm

N/A 0.006 in0.15 mm

N/A -434

BS433 S-70

N/A
186197

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.475 in139.07 mm

N/A 0.006 in0.15 mm

N/A -433

BS432 S-70

N/A
186198

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.350 in135.89 mm

N/A 0.006 in0.15 mm

N/A -432

BS431 S-70

N/A
186199

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.225 in132.72 mm

N/A 0.006 in0.15 mm

N/A -431

BS430 S-70

N/A
186200

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 5.100 in129.54 mm

N/A 0.006 in0.15 mm

N/A -430

BS429 S-70

N/A
186201

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 4.975 in126.37 mm

N/A 0.006 in0.15 mm

N/A -429

BS428 S-70

N/A
186202

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 4.850 in123.19 mm

N/A 0.006 in0.15 mm

N/A -428

BS427 S-70

N/A
186203

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 4.725 in120.02 mm

N/A 0.006 in0.15 mm

N/A -427

BS426 S-70

N/A
186204

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 4.600 in116.84 mm

N/A 0.006 in0.15 mm

N/A -426

BS425 S-70

N/A
186205

N/A BS Standard O-Ring

N/A Silicone

N/A 0.275 in6.99 mm

N/A 70

N/A 4.475 in113.67 mm

N/A 0.006 in0.15 mm

N/A -425

BS395 S-70

N/A
186206

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 25.940 in658.88 mm

N/A 0.005 in0.13 mm

N/A -395

BS394 S-70

N/A
186207

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 24.940 in633.48 mm

N/A 0.005 in0.13 mm

N/A -394

BS393 S-70

N/A
186208

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 23.940 in608.08 mm

N/A 0.005 in0.13 mm

N/A -393

BS392 S-70

N/A
186209

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 22.940 in582.68 mm

N/A 0.005 in0.13 mm

N/A -392

BS391 S-70

N/A
186210

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 21.955 in557.66 mm

N/A 0.005 in0.13 mm

N/A -391

BS390 S-70

N/A
186211

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 20.955 in532.26 mm

N/A 0.005 in0.13 mm

N/A -390

BS389 S-70

N/A
186212

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 19.955 in506.86 mm

N/A 0.005 in0.13 mm

N/A -389

BS388 S-70

N/A
186213

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 18.955 in481.46 mm

N/A 0.005 in0.13 mm

N/A -388

BS387 S-70

N/A
186214

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 17.955 in456.06 mm

N/A 0.005 in0.13 mm

N/A -387

BS386 S-70

N/A
186215

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 16.955 in430.66 mm

N/A 0.005 in0.13 mm

N/A -386

BS385 S-70

N/A
186216

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 15.955 in405.26 mm

N/A 0.005 in0.13 mm

N/A -385

BS384 S-70

N/A
186217

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 14.975 in380.37 mm

N/A 0.005 in0.13 mm

N/A -384

BS383 S-70

N/A
186218

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 13.975 in354.97 mm

N/A 0.005 in0.13 mm

N/A -383

BS382 S-70

N/A
186219

N/A BS Standard O-Ring

N/A Silicone

N/A 0.210 in5.33 mm

N/A 70

N/A 12.975 in329.57 mm

N/A 0.005 in0.13 mm

N/A -382