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 |
---|---|---|---|---|---|---|---|---|
BS31 B-70 |
IntegrationID
N/A 185043 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.739 in44.17 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -031 |
BS31 B-90 |
IntegrationID
N/A 185044 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.739 in44.17 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -031 |
BS30 B-70 |
IntegrationID
N/A 185045 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.614 in41.00 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -030 |
BS30 B-90 |
IntegrationID
N/A 185046 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.614 in41.00 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -030 |
BS29 B-70 |
IntegrationID
N/A 185047 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.489 in37.82 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -029 |
BS29 B-90 |
IntegrationID
N/A 185048 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.489 in37.82 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -029 |
BS28 B-70 |
IntegrationID
N/A 185049 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.364 in34.65 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -028 |
BS28 B-90 |
IntegrationID
N/A 185050 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.364 in34.65 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -028 |
BS27 B-70 |
IntegrationID
N/A 185051 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.301 in33.05 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -027 |
BS27 B-90 |
IntegrationID
N/A 185052 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.301 in33.05 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -027 |
BS26 B-70 |
IntegrationID
N/A 185053 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.239 in31.47 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -026 |
BS26 B-90 |
IntegrationID
N/A 185054 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.239 in31.47 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -026 |
BS25 B-70 |
IntegrationID
N/A 185055 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.176 in29.87 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -025 |
BS25 B-90 |
IntegrationID
N/A 185056 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.176 in29.87 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -025 |
BS24 B-70 |
IntegrationID
N/A 185057 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.114 in28.30 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -024 |
BS24 B-90 |
IntegrationID
N/A 185058 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.114 in28.30 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -024 |
BS23 B-70 |
IntegrationID
N/A 185059 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 1.051 in26.70 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -023 |
BS23 B-90 |
IntegrationID
N/A 185060 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 1.051 in26.70 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -023 |
BS22 B-70 |
IntegrationID
N/A 185061 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.989 in25.12 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -022 |
BS22 B-90 |
IntegrationID
N/A 185062 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.989 in25.12 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -022 |
BS21 B-70 |
IntegrationID
N/A 185063 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.926 in23.52 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -021 |
BS21 B-90 |
IntegrationID
N/A 185064 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.926 in23.52 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -021 |
BS20 B-70 |
IntegrationID
N/A 185065 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.864 in21.95 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -020 |
BS20 B-90 |
IntegrationID
N/A 185066 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 90 | Inside Diameter N/A 0.864 in21.95 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -020 |
BS19 B-70 |
IntegrationID
N/A 185067 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.070 in1.78 mm | Durometer N/A 70 | Inside Diameter N/A 0.801 in20.35 mm | CSW Tolerance N/A 0.003 in0.08 mm | BS Number N/A -019 |