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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
185018 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.739 in94.97 mm N/A 0.003 in0.08 mm N/A -044
N/A
185019 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.489 in88.62 mm N/A 0.003 in0.08 mm N/A -043
N/A
185020 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.489 in88.62 mm N/A 0.003 in0.08 mm N/A -043
N/A
185021 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.239 in82.27 mm N/A 0.003 in0.08 mm N/A -042
N/A
185022 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.239 in82.27 mm N/A 0.003 in0.08 mm N/A -042
N/A
185023 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.989 in75.92 mm N/A 0.003 in0.08 mm N/A -041
N/A
185024 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.989 in75.92 mm N/A 0.003 in0.08 mm N/A -041
N/A
185025 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.864 in72.75 mm N/A 0.003 in0.08 mm N/A -040
N/A
185026 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.864 in72.75 mm N/A 0.003 in0.08 mm N/A -040
N/A
185027 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.739 in69.57 mm N/A 0.003 in0.08 mm N/A -039
N/A
185028 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.739 in69.57 mm N/A 0.003 in0.08 mm N/A -039
N/A
185029 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.614 in66.40 mm N/A 0.003 in0.08 mm N/A -038
N/A
185030 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.614 in66.40 mm N/A 0.003 in0.08 mm N/A -038
N/A
185031 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.489 in63.22 mm N/A 0.003 in0.08 mm N/A -037
N/A
185032 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.489 in63.22 mm N/A 0.003 in0.08 mm N/A -037
N/A
185033 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.364 in60.05 mm N/A 0.003 in0.08 mm N/A -036
N/A
185034 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.364 in60.05 mm N/A 0.003 in0.08 mm N/A -036
N/A
185035 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.239 in56.87 mm N/A 0.003 in0.08 mm N/A -035
N/A
185036 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.239 in56.87 mm N/A 0.003 in0.08 mm N/A -035
N/A
185037 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 2.114 in53.70 mm N/A 0.003 in0.08 mm N/A -034
N/A
185038 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 2.114 in53.70 mm N/A 0.003 in0.08 mm N/A -034
N/A
185039 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.989 in50.52 mm N/A 0.003 in0.08 mm N/A -033
N/A
185040 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.989 in50.52 mm N/A 0.003 in0.08 mm N/A -033
N/A
185041 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.864 in47.35 mm N/A 0.003 in0.08 mm N/A -032
N/A
185042 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.864 in47.35 mm N/A 0.003 in0.08 mm N/A -032
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