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	Product Guides
37x6.00B70	N/A 124103	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 37.00 mm	N/A Seal Guides
37 X 6 B-90	N/A 124104	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 37.00 mm	N/A Seal Guides
38x6.00B70	N/A 124105	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 38.00 mm	N/A Seal Guides
38 X 6 B-90	N/A 124106	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 38.00 mm	N/A Seal Guides
39x6.00B70	N/A 124107	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 39.00 mm	N/A Seal Guides
39 X 6 B-90	N/A 124108	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 39.00 mm	N/A Seal Guides
39.5 X 6 B-70	N/A 124109	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 39.50 mm	N/A Seal Guides
39.5 X 6 B-90	N/A 124110	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 39.50 mm	N/A Seal Guides
40x6.00B70	N/A 124111	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 40.00 mm	N/A Seal Guides
40 X 6 B-90	N/A 124112	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 40.00 mm	N/A Seal Guides
41x6.00B70	N/A 124113	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 41.00 mm	N/A Seal Guides
41 X 6 B-90	N/A 124114	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 41.00 mm	N/A Seal Guides
41.5 X 6 B-70	N/A 124115	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 41.50 mm	N/A Seal Guides
41.5 X 6 B-90	N/A 124116	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 41.50 mm	N/A Seal Guides
42x6.00B70	N/A 124117	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 42.00 mm	N/A Seal Guides
42 X 6 B-90	N/A 124118	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 42.00 mm	N/A Seal Guides
43x6.00B70	N/A 124119	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 43.00 mm	N/A Seal Guides
43 X 6 B-90	N/A 124120	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 43.00 mm	N/A Seal Guides
44x6.00B70	N/A 124121	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 44.00 mm	N/A Seal Guides
44 X 6 B-90	N/A 124122	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 44.00 mm	N/A Seal Guides
44.5x6.00B70	N/A 124123	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 44.50 mm	N/A Seal Guides
44.5 X 6 B-90	N/A 124124	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 44.50 mm	N/A Seal Guides
45x6.00B70	N/A 124125	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 45.00 mm	N/A Seal Guides
45 X 6 B-90	N/A 124126	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 45.00 mm	N/A Seal Guides
46x6.00B70	N/A 124127	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 46.00 mm	N/A Seal Guides

N/A
124103

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 37.00 mm

N/A Seal Guides

37 X 6 B-90

N/A
124104

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 37.00 mm

N/A Seal Guides

38x6.00B70

N/A
124105

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 38.00 mm

N/A Seal Guides

38 X 6 B-90

N/A
124106

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 38.00 mm

N/A Seal Guides

39x6.00B70

N/A
124107

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 39.00 mm

N/A Seal Guides

39 X 6 B-90

N/A
124108

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 39.00 mm

N/A Seal Guides

39.5 X 6 B-70

N/A
124109

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 39.50 mm

N/A Seal Guides

39.5 X 6 B-90

N/A
124110

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 39.50 mm

N/A Seal Guides

40x6.00B70

N/A
124111

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 40.00 mm

N/A Seal Guides

40 X 6 B-90

N/A
124112

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 40.00 mm

N/A Seal Guides

41x6.00B70

N/A
124113

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 41.00 mm

N/A Seal Guides

41 X 6 B-90

N/A
124114

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 41.00 mm

N/A Seal Guides

41.5 X 6 B-70

N/A
124115

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 41.50 mm

N/A Seal Guides

41.5 X 6 B-90

N/A
124116

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 41.50 mm

N/A Seal Guides

42x6.00B70

N/A
124117

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 42.00 mm

N/A Seal Guides

42 X 6 B-90

N/A
124118

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 42.00 mm

N/A Seal Guides

43x6.00B70

N/A
124119

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 43.00 mm

N/A Seal Guides

43 X 6 B-90

N/A
124120

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 43.00 mm

N/A Seal Guides

44x6.00B70

N/A
124121

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 44.00 mm

N/A Seal Guides

44 X 6 B-90

N/A
124122

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 44.00 mm

N/A Seal Guides

44.5x6.00B70

N/A
124123

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 44.50 mm

N/A Seal Guides

44.5 X 6 B-90

N/A
124124

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 44.50 mm

N/A Seal Guides

45x6.00B70

N/A
124125

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 45.00 mm

N/A Seal Guides

45 X 6 B-90

N/A
124126

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 45.00 mm

N/A Seal Guides

46x6.00B70

N/A
124127

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 46.00 mm

N/A Seal Guides