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 |
---|---|---|---|---|---|---|---|---|
BS319 B-90 |
IntegrationID
N/A 184668 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 1.037 in26.34 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -319 |
BS318 B-70 |
IntegrationID
N/A 184669 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.975 in24.77 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -318 |
BS318 B-90 |
IntegrationID
N/A 184670 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.975 in24.77 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -318 |
BS317 B-70 |
IntegrationID
N/A 184671 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.912 in23.16 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -317 |
BS317 B-90 |
IntegrationID
N/A 184672 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.912 in23.16 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -317 |
BS316 B-70 |
IntegrationID
N/A 184673 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.850 in21.59 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -316 |
BS316 B-90 |
IntegrationID
N/A 184674 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.850 in21.59 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -316 |
BS315 B-70 |
IntegrationID
N/A 184675 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.787 in19.99 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -315 |
BS315 B-90 |
IntegrationID
N/A 184676 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.787 in19.99 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -315 |
BS314 B-70 |
IntegrationID
N/A 184677 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.725 in18.42 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -314 |
BS314 B-90 |
IntegrationID
N/A 184678 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.725 in18.42 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -314 |
BS313 B-70 |
IntegrationID
N/A 184679 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.662 in16.81 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -313 |
BS313 B-90 |
IntegrationID
N/A 184680 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.662 in16.81 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -313 |
BS312 B-70 |
IntegrationID
N/A 184681 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.600 in15.24 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -312 |
BS312 B-90 |
IntegrationID
N/A 184682 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.600 in15.24 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -312 |
BS311 B-70 |
IntegrationID
N/A 184683 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.537 in13.64 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -311 |
BS311 B-90 |
IntegrationID
N/A 184684 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.537 in13.64 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -311 |
BS310 B-70 |
IntegrationID
N/A 184685 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.475 in12.07 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -310 |
BS310 B-90 |
IntegrationID
N/A 184686 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.475 in12.07 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -310 |
BS309 B-70 |
IntegrationID
N/A 184687 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 70 | Inside Diameter N/A 0.412 in10.46 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -309 |
BS309 B-90 |
IntegrationID
N/A 184688 |
Type N/A BS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.210 in5.33 mm | Durometer N/A 90 | Inside Diameter N/A 0.412 in10.46 mm | CSW Tolerance N/A 0.005 in0.13 mm | BS Number N/A -309 |
BS281 B-70 |
IntegrationID
N/A 184689 |
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 14.984 in380.59 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -281 |
BS281 B-90 |
IntegrationID
N/A 184690 |
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 14.984 in380.59 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -281 |
BS280 B-70 |
IntegrationID
N/A 184691 |
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 13.984 in355.19 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -280 |
BS280 B-90 |
IntegrationID
N/A 184692 |
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 13.984 in355.19 mm | CSW Tolerance N/A 0.004 in0.10 mm | BS Number N/A -280 |