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
BS31 B-70 N/A
185043 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.739 in44.17 mm N/A 0.003 in0.08 mm N/A -031
BS31 B-90 N/A
185044 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.739 in44.17 mm N/A 0.003 in0.08 mm N/A -031
BS30 B-70 N/A
185045 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.614 in41.00 mm N/A 0.003 in0.08 mm N/A -030
BS30 B-90 N/A
185046 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.614 in41.00 mm N/A 0.003 in0.08 mm N/A -030
BS29 B-70 N/A
185047 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.489 in37.82 mm N/A 0.003 in0.08 mm N/A -029
BS29 B-90 N/A
185048 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.489 in37.82 mm N/A 0.003 in0.08 mm N/A -029
BS28 B-70 N/A
185049 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.364 in34.65 mm N/A 0.003 in0.08 mm N/A -028
BS28 B-90 N/A
185050 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.364 in34.65 mm N/A 0.003 in0.08 mm N/A -028
BS27 B-70 N/A
185051 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.301 in33.05 mm N/A 0.003 in0.08 mm N/A -027
BS27 B-90 N/A
185052 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.301 in33.05 mm N/A 0.003 in0.08 mm N/A -027
BS26 B-70 N/A
185053 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.239 in31.47 mm N/A 0.003 in0.08 mm N/A -026
BS26 B-90 N/A
185054 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.239 in31.47 mm N/A 0.003 in0.08 mm N/A -026
BS25 B-70 N/A
185055 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.176 in29.87 mm N/A 0.003 in0.08 mm N/A -025
BS25 B-90 N/A
185056 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.176 in29.87 mm N/A 0.003 in0.08 mm N/A -025
BS24 B-70 N/A
185057 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.114 in28.30 mm N/A 0.003 in0.08 mm N/A -024
BS24 B-90 N/A
185058 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.114 in28.30 mm N/A 0.003 in0.08 mm N/A -024
BS23 B-70 N/A
185059 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.051 in26.70 mm N/A 0.003 in0.08 mm N/A -023
BS23 B-90 N/A
185060 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.051 in26.70 mm N/A 0.003 in0.08 mm N/A -023
BS22 B-70 N/A
185061 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 0.989 in25.12 mm N/A 0.003 in0.08 mm N/A -022
BS22 B-90 N/A
185062 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 0.989 in25.12 mm N/A 0.003 in0.08 mm N/A -022
BS21 B-70 N/A
185063 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 0.926 in23.52 mm N/A 0.003 in0.08 mm N/A -021
BS21 B-90 N/A
185064 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 0.926 in23.52 mm N/A 0.003 in0.08 mm N/A -021
BS20 B-70 N/A
185065 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 0.864 in21.95 mm N/A 0.003 in0.08 mm N/A -020
BS20 B-90 N/A
185066 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 0.864 in21.95 mm N/A 0.003 in0.08 mm N/A -020
BS19 B-70 N/A
185067 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 0.801 in20.35 mm N/A 0.003 in0.08 mm N/A -019
Unit of Measure
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