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
BS145 B-90 N/A
184918 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.550 in64.77 mm N/A 0.003 in0.08 mm N/A -145
BS144 B-70 N/A
184919 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.487 in63.17 mm N/A 0.003 in0.08 mm N/A -144
BS144 B-90 N/A
184920 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.487 in63.17 mm N/A 0.003 in0.08 mm N/A -144
BS143 B-70 N/A
184921 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.425 in61.60 mm N/A 0.003 in0.08 mm N/A -143
BS143 B-90 N/A
184922 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.425 in61.60 mm N/A 0.003 in0.08 mm N/A -143
BS142 B-70 N/A
184923 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.362 in59.99 mm N/A 0.003 in0.08 mm N/A -142
BS142 B-90 N/A
184924 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.362 in59.99 mm N/A 0.003 in0.08 mm N/A -142
BS141 B-70 N/A
184925 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.300 in58.42 mm N/A 0.003 in0.08 mm N/A -141
BS141 B-90 N/A
184926 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.300 in58.42 mm N/A 0.003 in0.08 mm N/A -141
BS140 B-70 N/A
184927 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.237 in56.82 mm N/A 0.003 in0.08 mm N/A -140
BS140 B-90 N/A
184928 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.237 in56.82 mm N/A 0.003 in0.08 mm N/A -140
BS139 B-70 N/A
184929 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.175 in55.25 mm N/A 0.003 in0.08 mm N/A -139
BS139 B-90 N/A
184930 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.175 in55.25 mm N/A 0.003 in0.08 mm N/A -139
BS138 B-70 N/A
184931 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.112 in53.64 mm N/A 0.003 in0.08 mm N/A -138
BS138 B-90 N/A
184932 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.112 in53.64 mm N/A 0.003 in0.08 mm N/A -138
BS137 B-70 N/A
184933 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 2.050 in52.07 mm N/A 0.003 in0.08 mm N/A -137
BS137 B-90 N/A
184934 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 2.050 in52.07 mm N/A 0.003 in0.08 mm N/A -137
BS136 B-70 N/A
184935 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 1.987 in50.47 mm N/A 0.003 in0.08 mm N/A -136
BS136 B-90 N/A
184936 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 1.987 in50.47 mm N/A 0.003 in0.08 mm N/A -136
BS135 B-70 N/A
184937 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 1.925 in48.90 mm N/A 0.003 in0.08 mm N/A -135
BS135 B-90 N/A
184938 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 1.925 in48.90 mm N/A 0.003 in0.08 mm N/A -135
BS134 B-70 N/A
184939 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 1.862 in47.29 mm N/A 0.003 in0.08 mm N/A -134
BS134 B-90 N/A
184940 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 1.862 in47.29 mm N/A 0.003 in0.08 mm N/A -134
BS133 B-70 N/A
184941 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 70 N/A 1.799 in45.69 mm N/A 0.003 in0.08 mm N/A -133
BS133 B-90 N/A
184942 		N/A BS Standard O-Ring N/A Buna N/A 0.103 in2.62 mm N/A 90 N/A 1.799 in45.69 mm N/A 0.003 in0.08 mm N/A -133
Unit of Measure
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