• 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
184718 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 8.234 in209.14 mm N/A 0.004 in0.10 mm N/A -267
N/A
184719 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 7.984 in202.79 mm N/A 0.004 in0.10 mm N/A -266
N/A
184720 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 7.984 in202.79 mm N/A 0.004 in0.10 mm N/A -266
N/A
184721 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 7.734 in196.44 mm N/A 0.004 in0.10 mm N/A -265
N/A
184722 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 7.734 in196.44 mm N/A 0.004 in0.10 mm N/A -265
N/A
184723 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 7.484 in190.09 mm N/A 0.004 in0.10 mm N/A -264
N/A
184724 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 7.484 in190.09 mm N/A 0.004 in0.10 mm N/A -264
N/A
184725 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 7.234 in183.74 mm N/A 0.004 in0.10 mm N/A -263
N/A
184726 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 7.234 in183.74 mm N/A 0.004 in0.10 mm N/A -263
N/A
184727 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 6.984 in177.39 mm N/A 0.004 in0.10 mm N/A -262
N/A
184728 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 6.984 in177.39 mm N/A 0.004 in0.10 mm N/A -262
N/A
184729 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 6.734 in171.04 mm N/A 0.004 in0.10 mm N/A -261
N/A
184730 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 6.734 in171.04 mm N/A 0.004 in0.10 mm N/A -261
N/A
184731 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 6.484 in164.69 mm N/A 0.004 in0.10 mm N/A -260
N/A
184732 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 6.484 in164.69 mm N/A 0.004 in0.10 mm N/A -260
N/A
184733 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 6.234 in158.34 mm N/A 0.004 in0.10 mm N/A -259
N/A
184734 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 6.234 in158.34 mm N/A 0.004 in0.10 mm N/A -259
N/A
184735 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 5.984 in151.99 mm N/A 0.004 in0.10 mm N/A -258
N/A
184736 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 5.984 in151.99 mm N/A 0.004 in0.10 mm N/A -258
N/A
184737 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 5.859 in148.82 mm N/A 0.004 in0.10 mm N/A -257
N/A
184738 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 5.859 in148.82 mm N/A 0.004 in0.10 mm N/A -257
N/A
184739 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 5.734 in145.64 mm N/A 0.004 in0.10 mm N/A -256
N/A
184740 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 5.734 in145.64 mm N/A 0.004 in0.10 mm N/A -256
N/A
184741 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 5.609 in142.47 mm N/A 0.004 in0.10 mm N/A -255
N/A
184742 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 5.609 in142.47 mm N/A 0.004 in0.10 mm N/A -255
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