Metric Buna O-Rings

OneMonroe’s Metric Buna O-Rings are engineered to provide reliable sealing performance across a variety of industrial and commercial applications. Made from high-quality Buna-N (Nitrile) rubber, these O-rings are known for their excellent resistance to oils, fuels, and other petroleum-based products, making them ideal for use in environments where durable, leak-proof seals are essential. Buna-N’s resilient properties allow it to maintain its integrity even in challenging temperatures, ranging from -40°F to 250°F, ensuring these O-rings can withstand both low and high-stress conditions with ease. With a broad range of metric sizes available, OneMonroe ensures you’ll find the right fit for your exact specifications.

Our Metric Buna O-Rings are crafted to offer outstanding resistance to abrasion and tearing, providing long-lasting performance in rigorous applications. This makes them well-suited for automotive, aerospace, marine, and hydraulic systems, as well as in general maintenance and repair settings. The unique chemical composition of Buna-N allows these O-rings to endure pressure and friction over extended periods without compromising their sealing capabilities, making them a reliable choice for static and dynamic sealing tasks. Each O-ring is manufactured to precise industry standards, ensuring a dependable fit and function in every installation.

With OneMonroe, you’re getting more than just a product; you’re receiving a commitment to quality and expertise. Our team is dedicated to supporting your projects with high-quality metric Buna O-Rings that meet both industry standards and specific customer requirements. We provide technical support to help you select the best O-ring for your application, offering detailed product specifications and guidance. Trust OneMonroe to deliver durable, efficient, and cost-effective sealing solutions tailored to meet the demands of your unique projects.

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 Reference	Cross Section Width	Durometer	Inside Diameter
88.62 X 1.78 B-90	N/A 117746	N/A Metric Standard O-Ring	N/A Buna	N/A 43	N/A 1.78 mm	N/A 90	N/A 88.62 mm
91.7 X 1.78 B-70	N/A 117747	N/A Metric Standard O-Ring	N/A Buna	N/A BS536	N/A 1.78 mm	N/A 70	N/A 91.70 mm
91.7 X 1.78 B-90	N/A 117748	N/A Metric Standard O-Ring	N/A Buna	N/A BS536	N/A 1.78 mm	N/A 90	N/A 91.70 mm
94.97 X 1.78 B-70	N/A 117749	N/A Metric Standard O-Ring	N/A Buna	N/A 44	N/A 1.78 mm	N/A 70	N/A 94.97 mm
94.97 X 1.78 B-90	N/A 117750	N/A Metric Standard O-Ring	N/A Buna	N/A 44	N/A 1.78 mm	N/A 90	N/A 94.97 mm
98.05 X 1.78 B-70	N/A 117751	N/A Metric Standard O-Ring	N/A Buna	N/A BS538	N/A 1.78 mm	N/A 70	N/A 98.05 mm
98.05 X 1.78 B-90	N/A 117752	N/A Metric Standard O-Ring	N/A Buna	N/A BS538	N/A 1.78 mm	N/A 90	N/A 98.05 mm
101.32 X 1.78 B-70	N/A 117753	N/A Metric Standard O-Ring	N/A Buna	N/A 45	N/A 1.78 mm	N/A 70	N/A 101.32 mm
101.32 X 1.78 B-90	N/A 117754	N/A Metric Standard O-Ring	N/A Buna	N/A 45	N/A 1.78 mm	N/A 90	N/A 101.32 mm
104.4 X 1.78 B-70	N/A 117755	N/A Metric Standard O-Ring	N/A Buna	N/A BS540	N/A 1.78 mm	N/A 70	N/A 104.40 mm
104.4 X 1.78 B-90	N/A 117756	N/A Metric Standard O-Ring	N/A Buna	N/A BS540	N/A 1.78 mm	N/A 90	N/A 104.40 mm
107.67 X 1.78 B-70	N/A 117757	N/A Metric Standard O-Ring	N/A Buna	N/A 46	N/A 1.78 mm	N/A 70	N/A 107.67 mm
107.67 X 1.78 B-90	N/A 117758	N/A Metric Standard O-Ring	N/A Buna	N/A 46	N/A 1.78 mm	N/A 90	N/A 107.67 mm
110.74 X 1.78 B-70	N/A 117759	N/A Metric Standard O-Ring	N/A Buna	N/A BS542	N/A 1.78 mm	N/A 70	N/A 110.74 mm
110.74 X 1.78 B-90	N/A 117760	N/A Metric Standard O-Ring	N/A Buna	N/A BS542	N/A 1.78 mm	N/A 90	N/A 110.74 mm
114.02 X 1.78 B-70	N/A 117761	N/A Metric Standard O-Ring	N/A Buna	N/A 47	N/A 1.78 mm	N/A 70	N/A 114.02 mm
114.02 X 1.78 B-90	N/A 117762	N/A Metric Standard O-Ring	N/A Buna	N/A 47	N/A 1.78 mm	N/A 90	N/A 114.02 mm
117.1 X 1.78 B-70	N/A 117763	N/A Metric Standard O-Ring	N/A Buna	N/A BS544	N/A 1.78 mm	N/A 70	N/A 117.10 mm
117.1 X 1.78 B-90	N/A 117764	N/A Metric Standard O-Ring	N/A Buna	N/A BS544	N/A 1.78 mm	N/A 90	N/A 117.10 mm
120.37 X 1.78 B-70	N/A 117765	N/A Metric Standard O-Ring	N/A Buna	N/A 48	N/A 1.78 mm	N/A 70	N/A 120.37 mm
120.37 X 1.78 B-90	N/A 117766	N/A Metric Standard O-Ring	N/A Buna	N/A 48	N/A 1.78 mm	N/A 90	N/A 120.37 mm
123.44 X 1.78 B-70	N/A 117767	N/A Metric Standard O-Ring	N/A Buna	N/A BS546	N/A 1.78 mm	N/A 70	N/A 123.44 mm
123.44 X 1.78 B-90	N/A 117768	N/A Metric Standard O-Ring	N/A Buna	N/A BS546	N/A 1.78 mm	N/A 90	N/A 123.44 mm
126.72 X 1.78 B-70	N/A 117769	N/A Metric Standard O-Ring	N/A Buna	N/A 49	N/A 1.78 mm	N/A 70	N/A 126.72 mm
126.72 X 1.78 B-90	N/A 117770	N/A Metric Standard O-Ring	N/A Buna	N/A 49	N/A 1.78 mm	N/A 90	N/A 126.72 mm

N/A
117746

N/A Metric Standard O-Ring

N/A Buna

N/A 43

N/A 1.78 mm

N/A 90

N/A 88.62 mm

91.7 X 1.78 B-70

N/A
117747

N/A Metric Standard O-Ring

N/A Buna

N/A BS536

N/A 1.78 mm

N/A 70

N/A 91.70 mm

91.7 X 1.78 B-90

N/A
117748

N/A Metric Standard O-Ring

N/A Buna

N/A BS536

N/A 1.78 mm

N/A 90

N/A 91.70 mm

94.97 X 1.78 B-70

N/A
117749

N/A Metric Standard O-Ring

N/A Buna

N/A 44

N/A 1.78 mm

N/A 70

N/A 94.97 mm

94.97 X 1.78 B-90

N/A
117750

N/A Metric Standard O-Ring

N/A Buna

N/A 44

N/A 1.78 mm

N/A 90

N/A 94.97 mm

98.05 X 1.78 B-70

N/A
117751

N/A Metric Standard O-Ring

N/A Buna

N/A BS538

N/A 1.78 mm

N/A 70

N/A 98.05 mm

98.05 X 1.78 B-90

N/A
117752

N/A Metric Standard O-Ring

N/A Buna

N/A BS538

N/A 1.78 mm

N/A 90

N/A 98.05 mm

101.32 X 1.78 B-70

N/A
117753

N/A Metric Standard O-Ring

N/A Buna

N/A 45

N/A 1.78 mm

N/A 70

N/A 101.32 mm

101.32 X 1.78 B-90

N/A
117754

N/A Metric Standard O-Ring

N/A Buna

N/A 45

N/A 1.78 mm

N/A 90

N/A 101.32 mm

104.4 X 1.78 B-70

N/A
117755

N/A Metric Standard O-Ring

N/A Buna

N/A BS540

N/A 1.78 mm

N/A 70

N/A 104.40 mm

104.4 X 1.78 B-90

N/A
117756

N/A Metric Standard O-Ring

N/A Buna

N/A BS540

N/A 1.78 mm

N/A 90

N/A 104.40 mm

107.67 X 1.78 B-70

N/A
117757

N/A Metric Standard O-Ring

N/A Buna

N/A 46

N/A 1.78 mm

N/A 70

N/A 107.67 mm

107.67 X 1.78 B-90

N/A
117758

N/A Metric Standard O-Ring

N/A Buna

N/A 46

N/A 1.78 mm

N/A 90

N/A 107.67 mm

110.74 X 1.78 B-70

N/A
117759

N/A Metric Standard O-Ring

N/A Buna

N/A BS542

N/A 1.78 mm

N/A 70

N/A 110.74 mm

110.74 X 1.78 B-90

N/A
117760

N/A Metric Standard O-Ring

N/A Buna

N/A BS542

N/A 1.78 mm

N/A 90

N/A 110.74 mm

114.02 X 1.78 B-70

N/A
117761

N/A Metric Standard O-Ring

N/A Buna

N/A 47

N/A 1.78 mm

N/A 70

N/A 114.02 mm

114.02 X 1.78 B-90

N/A
117762

N/A Metric Standard O-Ring

N/A Buna

N/A 47

N/A 1.78 mm

N/A 90

N/A 114.02 mm

117.1 X 1.78 B-70

N/A
117763

N/A Metric Standard O-Ring

N/A Buna

N/A BS544

N/A 1.78 mm

N/A 70

N/A 117.10 mm

117.1 X 1.78 B-90

N/A
117764

N/A Metric Standard O-Ring

N/A Buna

N/A BS544

N/A 1.78 mm

N/A 90

N/A 117.10 mm

120.37 X 1.78 B-70

N/A
117765

N/A Metric Standard O-Ring

N/A Buna

N/A 48

N/A 1.78 mm

N/A 70

N/A 120.37 mm

120.37 X 1.78 B-90

N/A
117766

N/A Metric Standard O-Ring

N/A Buna

N/A 48

N/A 1.78 mm

N/A 90

N/A 120.37 mm

123.44 X 1.78 B-70

N/A
117767

N/A Metric Standard O-Ring

N/A Buna

N/A BS546

N/A 1.78 mm

N/A 70

N/A 123.44 mm

123.44 X 1.78 B-90

N/A
117768

N/A Metric Standard O-Ring

N/A Buna

N/A BS546

N/A 1.78 mm

N/A 90

N/A 123.44 mm

126.72 X 1.78 B-70

N/A
117769

N/A Metric Standard O-Ring

N/A Buna

N/A 49

N/A 1.78 mm

N/A 70

N/A 126.72 mm

126.72 X 1.78 B-90

N/A
117770

N/A Metric Standard O-Ring

N/A Buna

N/A 49

N/A 1.78 mm

N/A 90

N/A 126.72 mm