Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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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
BS331 B-70 N/A
184643 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.225 in56.52 mm N/A 0.005 in0.13 mm N/A -331
BS331 B-90 N/A
184644 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.225 in56.52 mm N/A 0.005 in0.13 mm N/A -331
BS330 B-70 N/A
184645 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.100 in53.34 mm N/A 0.005 in0.13 mm N/A -330
BS330 B-90 N/A
184646 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.100 in53.34 mm N/A 0.005 in0.13 mm N/A -330
BS329 B-70 N/A
184647 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.975 in50.17 mm N/A 0.005 in0.13 mm N/A -329
BS329 B-90 N/A
184648 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.975 in50.17 mm N/A 0.005 in0.13 mm N/A -329
BS328 B-70 N/A
184649 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.850 in46.99 mm N/A 0.005 in0.13 mm N/A -328
BS328 B-90 N/A
184650 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.850 in46.99 mm N/A 0.005 in0.13 mm N/A -328
BS327 B-70 N/A
184651 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.725 in43.82 mm N/A 0.005 in0.13 mm N/A -327
BS327 B-90 N/A
184652 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.725 in43.82 mm N/A 0.005 in0.13 mm N/A -327
BS326 B-70 N/A
184653 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.600 in40.64 mm N/A 0.005 in0.13 mm N/A -326
BS326 B-90 N/A
184654 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.600 in40.64 mm N/A 0.005 in0.13 mm N/A -326
BS325 B-70 N/A
184655 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.475 in37.47 mm N/A 0.005 in0.13 mm N/A -325
BS325 B-90 N/A
184656 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.475 in37.47 mm N/A 0.005 in0.13 mm N/A -325
BS324 B-70 N/A
184657 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.350 in34.29 mm N/A 0.005 in0.13 mm N/A -324
BS324 B-90 N/A
184658 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.350 in34.29 mm N/A 0.005 in0.13 mm N/A -324
BS323 B-70 N/A
184659 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.287 in32.69 mm N/A 0.005 in0.13 mm N/A -323
BS323 B-90 N/A
184660 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.287 in32.69 mm N/A 0.005 in0.13 mm N/A -323
BS322 B-70 N/A
184661 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.225 in31.12 mm N/A 0.005 in0.13 mm N/A -322
BS322 B-90 N/A
184662 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.225 in31.12 mm N/A 0.005 in0.13 mm N/A -322
BS321 B-70 N/A
184663 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.162 in29.51 mm N/A 0.005 in0.13 mm N/A -321
BS321 B-90 N/A
184664 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.162 in29.51 mm N/A 0.005 in0.13 mm N/A -321
BS320 B-70 N/A
184665 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.100 in27.94 mm N/A 0.005 in0.13 mm N/A -320
BS320 B-90 N/A
184666 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 1.100 in27.94 mm N/A 0.005 in0.13 mm N/A -320
BS319 B-70 N/A
184667 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 1.037 in26.34 mm N/A 0.005 in0.13 mm N/A -319
Unit of Measure
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