BS Buna O-Rings | OneMonroe

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.

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	BS Number	Product Guides
BS157 B-70	N/A 184893	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 4.487 in113.97 mm	N/A 0.003 in0.08 mm	N/A -157	N/A Seal Guides
BS157 B-90	N/A 184894	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 4.487 in113.97 mm	N/A 0.003 in0.08 mm	N/A -157	N/A Seal Guides
BS156 B-70	N/A 184895	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 4.237 in107.62 mm	N/A 0.003 in0.08 mm	N/A -156	N/A Seal Guides
BS156 B-90	N/A 184896	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 4.237 in107.62 mm	N/A 0.003 in0.08 mm	N/A -156	N/A Seal Guides
BS155 B-70	N/A 184897	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 3.987 in101.27 mm	N/A 0.003 in0.08 mm	N/A -155	N/A Seal Guides
BS155 B-90	N/A 184898	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 3.987 in101.27 mm	N/A 0.003 in0.08 mm	N/A -155	N/A Seal Guides
BS154 B-70	N/A 184899	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 3.737 in94.92 mm	N/A 0.003 in0.08 mm	N/A -154	N/A Seal Guides
BS154 B-90	N/A 184900	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 3.737 in94.92 mm	N/A 0.003 in0.08 mm	N/A -154	N/A Seal Guides
BS153 B-70	N/A 184901	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 3.487 in88.57 mm	N/A 0.003 in0.08 mm	N/A -153	N/A Seal Guides
BS153 B-90	N/A 184902	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 3.487 in88.57 mm	N/A 0.003 in0.08 mm	N/A -153	N/A Seal Guides
BS152 B-70	N/A 184903	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 3.237 in82.22 mm	N/A 0.003 in0.08 mm	N/A -152	N/A Seal Guides
BS152 B-90	N/A 184904	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 3.237 in82.22 mm	N/A 0.003 in0.08 mm	N/A -152	N/A Seal Guides
BS151 B-70	N/A 184905	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.987 in75.87 mm	N/A 0.003 in0.08 mm	N/A -151	N/A Seal Guides
BS151 B-90	N/A 184906	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.987 in75.87 mm	N/A 0.003 in0.08 mm	N/A -151	N/A Seal Guides
BS150 B-70	N/A 184907	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.862 in72.69 mm	N/A 0.003 in0.08 mm	N/A -150	N/A Seal Guides
BS150 B-90	N/A 184908	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.862 in72.69 mm	N/A 0.003 in0.08 mm	N/A -150	N/A Seal Guides
BS149 B-70	N/A 184909	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.800 in71.12 mm	N/A 0.003 in0.08 mm	N/A -149	N/A Seal Guides
BS149 B-90	N/A 184910	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.800 in71.12 mm	N/A 0.003 in0.08 mm	N/A -149	N/A Seal Guides
BS148 B-70	N/A 184911	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.737 in69.52 mm	N/A 0.003 in0.08 mm	N/A -148	N/A Seal Guides
BS148 B-90	N/A 184912	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.737 in69.52 mm	N/A 0.003 in0.08 mm	N/A -148	N/A Seal Guides
BS147 B-70	N/A 184913	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.675 in67.95 mm	N/A 0.003 in0.08 mm	N/A -147	N/A Seal Guides
BS147 B-90	N/A 184914	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.675 in67.95 mm	N/A 0.003 in0.08 mm	N/A -147	N/A Seal Guides
BS146 B-70	N/A 184915	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.612 in66.34 mm	N/A 0.003 in0.08 mm	N/A -146	N/A Seal Guides
BS146 B-90	N/A 184916	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 90	N/A 2.612 in66.34 mm	N/A 0.003 in0.08 mm	N/A -146	N/A Seal Guides
BS145 B-70	N/A 184917	N/A BS Standard O-Ring	N/A Buna	N/A 0.103 in2.62 mm	N/A 70	N/A 2.550 in64.77 mm	N/A 0.003 in0.08 mm	N/A -145	N/A Seal Guides

N/A
184893

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 4.487 in113.97 mm

N/A 0.003 in0.08 mm

N/A -157

N/A Seal Guides

BS157 B-90

N/A
184894

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 4.487 in113.97 mm

N/A 0.003 in0.08 mm

N/A -157

N/A Seal Guides

BS156 B-70

N/A
184895

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 4.237 in107.62 mm

N/A 0.003 in0.08 mm

N/A -156

N/A Seal Guides

BS156 B-90

N/A
184896

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 4.237 in107.62 mm

N/A 0.003 in0.08 mm

N/A -156

N/A Seal Guides

BS155 B-70

N/A
184897

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 3.987 in101.27 mm

N/A 0.003 in0.08 mm

N/A -155

N/A Seal Guides

BS155 B-90

N/A
184898

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 3.987 in101.27 mm

N/A 0.003 in0.08 mm

N/A -155

N/A Seal Guides

BS154 B-70

N/A
184899

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 3.737 in94.92 mm

N/A 0.003 in0.08 mm

N/A -154

N/A Seal Guides

BS154 B-90

N/A
184900

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 3.737 in94.92 mm

N/A 0.003 in0.08 mm

N/A -154

N/A Seal Guides

BS153 B-70

N/A
184901

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 3.487 in88.57 mm

N/A 0.003 in0.08 mm

N/A -153

N/A Seal Guides

BS153 B-90

N/A
184902

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 3.487 in88.57 mm

N/A 0.003 in0.08 mm

N/A -153

N/A Seal Guides

BS152 B-70

N/A
184903

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 3.237 in82.22 mm

N/A 0.003 in0.08 mm

N/A -152

N/A Seal Guides

BS152 B-90

N/A
184904

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 3.237 in82.22 mm

N/A 0.003 in0.08 mm

N/A -152

N/A Seal Guides

BS151 B-70

N/A
184905

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.987 in75.87 mm

N/A 0.003 in0.08 mm

N/A -151

N/A Seal Guides

BS151 B-90

N/A
184906

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.987 in75.87 mm

N/A 0.003 in0.08 mm

N/A -151

N/A Seal Guides

BS150 B-70

N/A
184907

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.862 in72.69 mm

N/A 0.003 in0.08 mm

N/A -150

N/A Seal Guides

BS150 B-90

N/A
184908

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.862 in72.69 mm

N/A 0.003 in0.08 mm

N/A -150

N/A Seal Guides

BS149 B-70

N/A
184909

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.800 in71.12 mm

N/A 0.003 in0.08 mm

N/A -149

N/A Seal Guides

BS149 B-90

N/A
184910

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.800 in71.12 mm

N/A 0.003 in0.08 mm

N/A -149

N/A Seal Guides

BS148 B-70

N/A
184911

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.737 in69.52 mm

N/A 0.003 in0.08 mm

N/A -148

N/A Seal Guides

BS148 B-90

N/A
184912

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.737 in69.52 mm

N/A 0.003 in0.08 mm

N/A -148

N/A Seal Guides

BS147 B-70

N/A
184913

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.675 in67.95 mm

N/A 0.003 in0.08 mm

N/A -147

N/A Seal Guides

BS147 B-90

N/A
184914

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.675 in67.95 mm

N/A 0.003 in0.08 mm

N/A -147

N/A Seal Guides

BS146 B-70

N/A
184915

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.612 in66.34 mm

N/A 0.003 in0.08 mm

N/A -146

N/A Seal Guides

BS146 B-90

N/A
184916

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 90

N/A 2.612 in66.34 mm

N/A 0.003 in0.08 mm

N/A -146

N/A Seal Guides

BS145 B-70

N/A
184917

N/A BS Standard O-Ring

N/A Buna

N/A 0.103 in2.62 mm

N/A 70

N/A 2.550 in64.77 mm

N/A 0.003 in0.08 mm

N/A -145

N/A Seal Guides