• 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
184818 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.171 in29.74 mm N/A 0.004 in0.10 mm N/A -217
N/A
184819 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.109 in28.17 mm N/A 0.004 in0.10 mm N/A -216
N/A
184820 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.109 in28.17 mm N/A 0.004 in0.10 mm N/A -216
N/A
184821 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 1.046 in26.57 mm N/A 0.004 in0.10 mm N/A -215
N/A
184822 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 1.046 in26.57 mm N/A 0.004 in0.10 mm N/A -215
N/A
184823 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.984 in24.99 mm N/A 0.004 in0.10 mm N/A -214
N/A
184824 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.984 in24.99 mm N/A 0.004 in0.10 mm N/A -214
N/A
184825 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.921 in23.39 mm N/A 0.004 in0.10 mm N/A -213
N/A
184826 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.921 in23.39 mm N/A 0.004 in0.10 mm N/A -213
N/A
184827 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.859 in21.82 mm N/A 0.004 in0.10 mm N/A -212
N/A
184828 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.859 in21.82 mm N/A 0.004 in0.10 mm N/A -212
N/A
184829 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.796 in20.22 mm N/A 0.004 in0.10 mm N/A -211
N/A
184830 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.796 in20.22 mm N/A 0.004 in0.10 mm N/A -211
N/A
184831 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.734 in18.64 mm N/A 0.004 in0.10 mm N/A -210
N/A
184832 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.734 in18.64 mm N/A 0.004 in0.10 mm N/A -210
N/A
184833 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.672 in17.07 mm N/A 0.004 in0.10 mm N/A -209
N/A
184834 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.672 in17.07 mm N/A 0.004 in0.10 mm N/A -209
N/A
184835 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.609 in15.47 mm N/A 0.004 in0.10 mm N/A -208
N/A
184836 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.609 in15.47 mm N/A 0.004 in0.10 mm N/A -208
N/A
184837 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.549 in13.94 mm N/A 0.004 in0.10 mm N/A -207
N/A
184838 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.549 in13.94 mm N/A 0.004 in0.10 mm N/A -207
N/A
184839 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.484 in12.29 mm N/A 0.004 in0.10 mm N/A -206
N/A
184840 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.484 in12.29 mm N/A 0.004 in0.10 mm N/A -206
N/A
184841 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.421 in10.69 mm N/A 0.004 in0.10 mm N/A -205
N/A
184842 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.421 in10.69 mm N/A 0.004 in0.10 mm N/A -205
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