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  • BS O-Rings

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.

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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

N/A
184768 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.984 in101.19 mm N/A 0.004 in0.10 mm N/A -242
N/A
184769 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.859 in98.02 mm N/A 0.004 in0.10 mm N/A -241
N/A
184770 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.859 in98.02 mm N/A 0.004 in0.10 mm N/A -241
N/A
184771 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.734 in94.84 mm N/A 0.004 in0.10 mm N/A -240
N/A
184772 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.734 in94.84 mm N/A 0.004 in0.10 mm N/A -240
N/A
184773 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.609 in91.67 mm N/A 0.004 in0.10 mm N/A -239
N/A
184774 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.609 in91.67 mm N/A 0.004 in0.10 mm N/A -239
N/A
184775 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.484 in88.49 mm N/A 0.004 in0.10 mm N/A -238
N/A
184776 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.484 in88.49 mm N/A 0.004 in0.10 mm N/A -238
N/A
184777 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.359 in85.32 mm N/A 0.004 in0.10 mm N/A -237
N/A
184778 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.359 in85.32 mm N/A 0.004 in0.10 mm N/A -237
N/A
184779 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.234 in82.14 mm N/A 0.004 in0.10 mm N/A -236
N/A
184780 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.234 in82.14 mm N/A 0.004 in0.10 mm N/A -236
N/A
184781 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 3.109 in78.97 mm N/A 0.004 in0.10 mm N/A -235
N/A
184782 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 3.109 in78.97 mm N/A 0.004 in0.10 mm N/A -235
N/A
184783 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.984 in75.79 mm N/A 0.004 in0.10 mm N/A -234
N/A
184784 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.984 in75.79 mm N/A 0.004 in0.10 mm N/A -234
N/A
184785 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.859 in72.62 mm N/A 0.004 in0.10 mm N/A -233
N/A
184786 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.859 in72.62 mm N/A 0.004 in0.10 mm N/A -233
N/A
184787 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.734 in69.44 mm N/A 0.004 in0.10 mm N/A -232
N/A
184788 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.734 in69.44 mm N/A 0.004 in0.10 mm N/A -232
N/A
184789 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.609 in66.27 mm N/A 0.004 in0.10 mm N/A -231
N/A
184790 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.609 in66.27 mm N/A 0.004 in0.10 mm N/A -231
N/A
184791 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.484 in63.09 mm N/A 0.004 in0.10 mm N/A -230
N/A
184792 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.484 in63.09 mm N/A 0.004 in0.10 mm N/A -230
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