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.
Cross Section Width (in)
Cross Section Width (mm)
Durometer
Inside Diameter (in)
Inside Diameter (mm)
Item # |
IntegrationID |
Type |
Material |
Cross Section Width |
Durometer |
Inside Diameter |
CSW Tolerance |
BS Number |
---|---|---|---|---|---|---|---|---|
BS279 B-70 |
IntegrationID
N/A 184693 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 12.984 in329.79 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -279 |
BS279 B-90 |
IntegrationID
N/A 184694 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 12.984 in329.79 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -279 |
BS278 B-70 |
IntegrationID
N/A 184695 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 11.984 in304.39 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -278 |
BS278 B-90 |
IntegrationID
N/A 184696 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 11.984 in304.39 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -278 |
BS277 B-70 |
IntegrationID
N/A 184697 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 11.484 in291.69 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -277 |
BS277 B-90 |
IntegrationID
N/A 184698 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 11.484 in291.69 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -277 |
BS276 B-70 |
IntegrationID
N/A 184699 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 10.984 in278.99 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -276 |
BS276 B-90 |
IntegrationID
N/A 184700 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 10.984 in278.99 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -276 |
BS275 B-70 |
IntegrationID
N/A 184701 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 10.484 in266.29 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -275 |
BS275 B-90 |
IntegrationID
N/A 184702 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 10.484 in266.29 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -275 |
BS274 B-70 |
IntegrationID
N/A 184703 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 9.984 in253.59 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -274 |
BS274 B-90 |
IntegrationID
N/A 184704 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 9.984 in253.59 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -274 |
BS273 B-70 |
IntegrationID
N/A 184705 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 9.734 in247.24 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -273 |
BS273 B-90 |
IntegrationID
N/A 184706 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 9.734 in247.24 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -273 |
BS272 B-70 |
IntegrationID
N/A 184707 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 9.484 in240.89 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -272 |
BS272 B-90 |
IntegrationID
N/A 184708 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 9.484 in240.89 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -272 |
BS271 B-70 |
IntegrationID
N/A 184709 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 9.234 in234.54 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -271 |
BS271 B-90 |
IntegrationID
N/A 184710 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 9.234 in234.54 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -271 |
BS270 B-70 |
IntegrationID
N/A 184711 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 8.984 in228.19 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -270 |
BS270 B-90 |
IntegrationID
N/A 184712 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 8.984 in228.19 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -270 |
BS269 B-70 |
IntegrationID
N/A 184713 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 8.734 in221.84 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -269 |
BS269 B-90 |
IntegrationID
N/A 184714 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 8.734 in221.84 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -269 |
BS268 B-70 |
IntegrationID
N/A 184715 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 8.484 in215.49 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -268 |
BS268 B-90 |
IntegrationID
N/A 184716 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 90 | Inside Diameter N/A 8.484 in215.49 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -268 |
BS267 B-70 |
IntegrationID
N/A 184717 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.139 in3.53 mm | Durometer N/A 70 | Inside Diameter N/A 8.234 in209.14 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -267 |