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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
184218 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.625 in142.88 mm N/A 0.005 in0.13 mm N/A -868
N/A
184219 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.5 in139.70 mm N/A 0.005 in0.13 mm N/A -867
N/A
184220 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.5 in139.70 mm N/A 0.005 in0.13 mm N/A -867
N/A
184221 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.375 in136.53 mm N/A 0.005 in0.13 mm N/A -866
N/A
184222 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.375 in136.53 mm N/A 0.005 in0.13 mm N/A -866
N/A
184223 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.25 in133.35 mm N/A 0.005 in0.13 mm N/A -865
N/A
184224 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.25 in133.35 mm N/A 0.005 in0.13 mm N/A -865
N/A
184225 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.125 in130.18 mm N/A 0.005 in0.13 mm N/A -864
N/A
184226 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.125 in130.18 mm N/A 0.005 in0.13 mm N/A -864
N/A
184227 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 5.000 in127.00 mm N/A 0.005 in0.13 mm N/A -863
N/A
184228 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 5.000 in127.00 mm N/A 0.005 in0.13 mm N/A -863
N/A
184229 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 4.875 in123.83 mm N/A 0.005 in0.13 mm N/A -862
N/A
184230 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 4.875 in123.83 mm N/A 0.005 in0.13 mm N/A -862
N/A
184231 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 4.75 in120.65 mm N/A 0.005 in0.13 mm N/A -861
N/A
184232 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 4.75 in120.65 mm N/A 0.005 in0.13 mm N/A -861
N/A
184233 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 4.625 in117.48 mm N/A 0.005 in0.13 mm N/A -860
N/A
184234 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 4.625 in117.48 mm N/A 0.005 in0.13 mm N/A -860
N/A
184235 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.937 in74.60 mm N/A 0.004 in0.10 mm N/A -846
N/A
184236 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.937 in74.60 mm N/A 0.004 in0.10 mm N/A -846
N/A
184237 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.875 in73.03 mm N/A 0.004 in0.10 mm N/A -845
N/A
184238 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.875 in73.03 mm N/A 0.004 in0.10 mm N/A -845
N/A
184239 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.813 in71.44 mm N/A 0.004 in0.10 mm N/A -844
N/A
184240 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.813 in71.44 mm N/A 0.004 in0.10 mm N/A -844
N/A
184241 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 2.75 in69.85 mm N/A 0.004 in0.10 mm N/A -843
N/A
184242 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 2.75 in69.85 mm N/A 0.004 in0.10 mm N/A -843
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