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
BS279 B-70 N/A
184693 		N/A BS Standard O-Ring N/A Buna 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
BS279 B-90 N/A
184694 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 12.984 in329.79 mm N/A 0.004 in0.10 mm N/A -279
BS278 B-70 N/A
184695 		N/A BS Standard O-Ring N/A Buna 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
BS278 B-90 N/A
184696 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 11.984 in304.39 mm N/A 0.004 in0.10 mm N/A -278
BS277 B-70 N/A
184697 		N/A BS Standard O-Ring N/A Buna 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
BS277 B-90 N/A
184698 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 11.484 in291.69 mm N/A 0.004 in0.10 mm N/A -277
BS276 B-70 N/A
184699 		N/A BS Standard O-Ring N/A Buna 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
BS276 B-90 N/A
184700 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 10.984 in278.99 mm N/A 0.004 in0.10 mm N/A -276
BS275 B-70 N/A
184701 		N/A BS Standard O-Ring N/A Buna 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
BS275 B-90 N/A
184702 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 10.484 in266.29 mm N/A 0.004 in0.10 mm N/A -275
BS274 B-70 N/A
184703 		N/A BS Standard O-Ring N/A Buna 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
BS274 B-90 N/A
184704 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 9.984 in253.59 mm N/A 0.004 in0.10 mm N/A -274
BS273 B-70 N/A
184705 		N/A BS Standard O-Ring N/A Buna 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
BS273 B-90 N/A
184706 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 9.734 in247.24 mm N/A 0.004 in0.10 mm N/A -273
BS272 B-70 N/A
184707 		N/A BS Standard O-Ring N/A Buna 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
BS272 B-90 N/A
184708 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 9.484 in240.89 mm N/A 0.004 in0.10 mm N/A -272
BS271 B-70 N/A
184709 		N/A BS Standard O-Ring N/A Buna 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
BS271 B-90 N/A
184710 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 9.234 in234.54 mm N/A 0.004 in0.10 mm N/A -271
BS270 B-70 N/A
184711 		N/A BS Standard O-Ring N/A Buna 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
BS270 B-90 N/A
184712 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 8.984 in228.19 mm N/A 0.004 in0.10 mm N/A -270
BS269 B-70 N/A
184713 		N/A BS Standard O-Ring N/A Buna 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
BS269 B-90 N/A
184714 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 8.734 in221.84 mm N/A 0.004 in0.10 mm N/A -269
BS268 B-70 N/A
184715 		N/A BS Standard O-Ring N/A Buna 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
BS268 B-90 N/A
184716 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 8.484 in215.49 mm N/A 0.004 in0.10 mm N/A -268
BS267 B-70 N/A
184717 		N/A BS Standard O-Ring N/A Buna 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
Unit of Measure
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