Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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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.

BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

Quantity
BS204 B-70 N/A
184843 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.359 in9.12 mm N/A 0.004 in0.10 mm N/A -204
BS204 B-90 N/A
184844 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.359 in9.12 mm N/A 0.004 in0.10 mm N/A -204
BS203 B-70 N/A
184845 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.296 in7.52 mm N/A 0.004 in0.10 mm N/A -203
BS203 B-90 N/A
184846 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.296 in7.52 mm N/A 0.004 in0.10 mm N/A -203
BS202 B-70 N/A
184847 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.234 in5.94 mm N/A 0.004 in0.10 mm N/A -202
BS202 B-90 N/A
184848 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.234 in5.94 mm N/A 0.004 in0.10 mm N/A -202
BS201 B-70 N/A
184849 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 70 N/A 0.171 in4.34 mm N/A 0.004 in0.10 mm N/A -201
BS201 B-90 N/A
184850 		N/A BS Standard O-Ring N/A Buna N/A 0.139 in3.53 mm N/A 90 N/A 0.171 in4.34 mm N/A 0.004 in0.10 mm N/A -201
BS178 B-70 N/A
184851 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 9.737 in247.32 mm N/A 0.003 in0.08 mm N/A -178
BS178 B-90 N/A
184852 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 9.737 in247.32 mm N/A 0.003 in0.08 mm N/A -178
BS177 B-70 N/A
184853 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 9.487 in240.97 mm N/A 0.003 in0.08 mm N/A -177
BS177 B-90 N/A
184854 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 9.487 in240.97 mm N/A 0.003 in0.08 mm N/A -177
BS176 B-70 N/A
184855 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 9.237 in234.62 mm N/A 0.003 in0.08 mm N/A -176
BS176 B-90 N/A
184856 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 9.237 in234.62 mm N/A 0.003 in0.08 mm N/A -176
BS175 B-70 N/A
184857 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 8.987 in228.27 mm N/A 0.003 in0.08 mm N/A -175
BS175 B-90 N/A
184858 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 8.987 in228.27 mm N/A 0.003 in0.08 mm N/A -175
BS174 B-70 N/A
184859 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 8.737 in221.92 mm N/A 0.003 in0.08 mm N/A -174
BS174 B-90 N/A
184860 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 8.737 in221.92 mm N/A 0.003 in0.08 mm N/A -174
BS173 B-70 N/A
184861 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 8.487 in215.57 mm N/A 0.003 in0.08 mm N/A -173
BS173 B-90 N/A
184862 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 8.487 in215.57 mm N/A 0.003 in0.08 mm N/A -173
BS172 B-70 N/A
184863 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 8.237 in209.22 mm N/A 0.003 in0.08 mm N/A -172
BS172 B-90 N/A
184864 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 8.237 in209.22 mm N/A 0.003 in0.08 mm N/A -172
BS171 B-70 N/A
184865 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 7.987 in202.87 mm N/A 0.003 in0.08 mm N/A -171
BS171 B-90 N/A
184866 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 7.987 in202.87 mm N/A 0.003 in0.08 mm N/A -171
BS170 B-70 N/A
184867 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 7.737 in196.52 mm N/A 0.003 in0.08 mm N/A -170
Unit of Measure
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