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
38 X 1.5 B-70	N/A 117421	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 38.00 mm
38 X 1.5 B-90	N/A 117422	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 38.00 mm
38.5 X 1.5 B-70	N/A 117423	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 38.50 mm
38.5 X 1.5 B-90	N/A 117424	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 38.50 mm
39 X 1.5 B-70	N/A 117425	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 39.00 mm
39 X 1.5 B-90	N/A 117426	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 39.00 mm
39.5 X 1.5 B-70	N/A 117427	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 39.50 mm
39.5 X 1.5 B-90	N/A 117428	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 39.50 mm
40 X 1.5 B-70	N/A 117429	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 40.00 mm
40 X 1.5 B-90	N/A 117430	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 40.00 mm
41 X 1.5 B-70	N/A 117431	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 41.00 mm
41 X 1.5 B-90	N/A 117432	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 41.00 mm
42 X 1.5 B-70	N/A 117433	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 42.00 mm
42 X 1.5 B-90	N/A 117434	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 42.00 mm
43 X 1.5 B-70	N/A 117435	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 43.00 mm
43 X 1.5 B-90	N/A 117436	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 43.00 mm
44 X 1.5 B-70	N/A 117437	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 44.00 mm
44 X 1.5 B-90	N/A 117438	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 44.00 mm
45 X 1.5 B-70	N/A 117439	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 45.00 mm
45 X 1.5 B-90	N/A 117440	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 45.00 mm
46 X 1.5 B-70	N/A 117441	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 46.00 mm
46 X 1.5 B-90	N/A 117442	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 46.00 mm
47 X 1.5 B-70	N/A 117443	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 47.00 mm
47 X 1.5 B-90	N/A 117444	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 90	N/A 47.00 mm
48 X 1.5 B-70	N/A 117445	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 1.50 mm	N/A 70	N/A 48.00 mm

N/A
117421

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 38.00 mm

38 X 1.5 B-90

N/A
117422

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 38.00 mm

38.5 X 1.5 B-70

N/A
117423

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 38.50 mm

38.5 X 1.5 B-90

N/A
117424

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 38.50 mm

39 X 1.5 B-70

N/A
117425

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 39.00 mm

39 X 1.5 B-90

N/A
117426

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 39.00 mm

39.5 X 1.5 B-70

N/A
117427

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 39.50 mm

39.5 X 1.5 B-90

N/A
117428

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 39.50 mm

40 X 1.5 B-70

N/A
117429

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 40.00 mm

40 X 1.5 B-90

N/A
117430

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 40.00 mm

41 X 1.5 B-70

N/A
117431

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 41.00 mm

41 X 1.5 B-90

N/A
117432

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 41.00 mm

42 X 1.5 B-70

N/A
117433

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 42.00 mm

42 X 1.5 B-90

N/A
117434

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 42.00 mm

43 X 1.5 B-70

N/A
117435

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 43.00 mm

43 X 1.5 B-90

N/A
117436

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 43.00 mm

44 X 1.5 B-70

N/A
117437

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 44.00 mm

44 X 1.5 B-90

N/A
117438

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 44.00 mm

45 X 1.5 B-70

N/A
117439

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 45.00 mm

45 X 1.5 B-90

N/A
117440

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 45.00 mm

46 X 1.5 B-70

N/A
117441

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 46.00 mm

46 X 1.5 B-90

N/A
117442

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 46.00 mm

47 X 1.5 B-70

N/A
117443

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 47.00 mm

47 X 1.5 B-90

N/A
117444

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 90

N/A 47.00 mm

48 X 1.5 B-70

N/A
117445

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 1.50 mm

N/A 70

N/A 48.00 mm