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OneMonroe BUNA O-Rings are engineered to provide dependable sealing solutions for a wide range of industrial applications. Crafted from high-quality BUNA-N material, also known as Nitrile, these O-rings deliver exceptional resistance to oils, fuels, and various chemicals, making them a top choice for machinery, automotive, and hydraulic systems. Their robust design ensures a reliable seal in both low and high-pressure environments, protecting against leaks, contamination, and wear. Each O-ring is manufactured to precise industry standards, offering a secure fit and lasting performance that businesses can depend on in even the most demanding conditions.

Our selection of BUNA O-rings includes an extensive variety of sizes and specifications, designed to suit a wide array of sealing needs. From small to large diameters, OneMonroe provides O-rings that can be used across multiple industries, including aerospace, manufacturing, and construction. These O-rings are versatile, supporting applications that require excellent abrasion resistance and the ability to perform reliably in temperatures ranging from -40°F to 212°F. OneMonroe BUNA O-Rings are known for their compatibility with petroleum-based fluids and are often the go-to choice for applications involving oil and gas, where durability and flexibility are essential.

OneMonroe is dedicated to delivering high-quality, cost-effective solutions that meet the unique needs of its customers. Our BUNA O-rings undergo rigorous testing and quality control to ensure each product meets strict performance standards. Whether you’re in need of O-rings for maintenance, repair, or original equipment manufacturing, OneMonroe's BUNA O-rings provide a dependable, long-lasting solution. With a commitment to exceptional customer service, Monroe ensures you have access to the precise sealing products you need to keep your operations running smoothly.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

Quantity
BS369 B-90 N/A
184568
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 7.975 in202.57 mm N/A 0.005 in0.13 mm N/A -369
BS368 B-70 N/A
184569
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 7.725 in196.22 mm N/A 0.005 in0.13 mm N/A -368
BS368 B-90 N/A
184570
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 7.725 in196.22 mm N/A 0.005 in0.13 mm N/A -368
BS367 B-70 N/A
184571
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 7.475 in189.87 mm N/A 0.005 in0.13 mm N/A -367
BS367 B-90 N/A
184572
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 7.475 in189.87 mm N/A 0.005 in0.13 mm N/A -367
BS366 B-70 N/A
184573
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 7.225 in183.52 mm N/A 0.005 in0.13 mm N/A -366
BS366 B-90 N/A
184574
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 7.225 in183.52 mm N/A 0.005 in0.13 mm N/A -366
BS365 B-70 N/A
184575
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 6.975 in177.17 mm N/A 0.005 in0.13 mm N/A -365
BS365 B-90 N/A
184576
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 6.975 in177.17 mm N/A 0.005 in0.13 mm N/A -365
BS364 B-70 N/A
184577
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 6.725 in170.82 mm N/A 0.005 in0.13 mm N/A -364
BS364 B-90 N/A
184578
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 6.725 in170.82 mm N/A 0.005 in0.13 mm N/A -364
BS363 B-70 N/A
184579
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 6.475 in164.47 mm N/A 0.005 in0.13 mm N/A -363
BS363 B-90 N/A
184580
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 6.475 in164.47 mm N/A 0.005 in0.13 mm N/A -363
BS362 B-70 N/A
184581
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 6.225 in158.12 mm N/A 0.005 in0.13 mm N/A -362
BS362 B-90 N/A
184582
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 6.225 in158.12 mm N/A 0.005 in0.13 mm N/A -362
BS361 B-70 N/A
184583
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.975 in151.77 mm N/A 0.005 in0.13 mm N/A -361
BS361 B-90 N/A
184584
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.975 in151.77 mm N/A 0.005 in0.13 mm N/A -361
BS360 B-70 N/A
184585
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.850 in148.59 mm N/A 0.005 in0.13 mm N/A -360
BS360 B-90 N/A
184586
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.850 in148.59 mm N/A 0.005 in0.13 mm N/A -360
BS359 B-70 N/A
184587
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.725 in145.42 mm N/A 0.005 in0.13 mm N/A -359
BS359 B-90 N/A
184588
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.725 in145.42 mm N/A 0.005 in0.13 mm N/A -359
BS358 B-70 N/A
184589
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.600 in142.24 mm N/A 0.005 in0.13 mm N/A -358
BS358 B-90 N/A
184590
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.600 in142.24 mm N/A 0.005 in0.13 mm N/A -358
BS357 B-70 N/A
184591
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.475 in139.07 mm N/A 0.005 in0.13 mm N/A -357
BS357 B-90 N/A
184592
N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.475 in139.07 mm N/A 0.005 in0.13 mm N/A -357
Unit of Measure
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