Monroe
OneMonroe
Locations Throughout the Country
ISO 9001:2015
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
BS546 B-70 N/A
184393 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 4.86 in123.44 mm N/A 0.003 in0.08 mm N/A -546
BS546 B-90 N/A
184394 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 4.86 in123.44 mm N/A 0.003 in0.08 mm N/A -546
BS544 B-70 N/A
184395 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 4.61 in117.09 mm N/A 0.003 in0.08 mm N/A -544
BS544 B-90 N/A
184396 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 4.61 in117.09 mm N/A 0.003 in0.08 mm N/A -544
BS542 B-70 N/A
184397 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 4.36 in110.74 mm N/A 0.003 in0.08 mm N/A -542
BS542 B-90 N/A
184398 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 4.36 in110.74 mm N/A 0.003 in0.08 mm N/A -542
BS540 B-70 N/A
184399 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 4.110 in104.39 mm N/A 0.003 in0.08 mm N/A -540
BS540 B-90 N/A
184400 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 4.110 in104.39 mm N/A 0.003 in0.08 mm N/A -540
BS538 B-70 N/A
184401 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.86 in98.04 mm N/A 0.003 in0.08 mm N/A -538
BS538 B-90 N/A
184402 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.86 in98.04 mm N/A 0.003 in0.08 mm N/A -538
BS536 B-70 N/A
184403 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.61 in91.69 mm N/A 0.003 in0.08 mm N/A -536
BS536 B-90 N/A
184404 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.61 in91.69 mm N/A 0.003 in0.08 mm N/A -536
BS534 B-70 N/A
184405 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.36 in85.34 mm N/A 0.003 in0.08 mm N/A -534
BS534 B-90 N/A
184406 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.36 in85.34 mm N/A 0.003 in0.08 mm N/A -534
BS532 B-70 N/A
184407 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 3.11 in78.99 mm N/A 0.003 in0.08 mm N/A -532
BS532 B-90 N/A
184408 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 3.11 in78.99 mm N/A 0.003 in0.08 mm N/A -532
BS519 B-70 N/A
184409 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.553 in39.45 mm N/A 0.003 in0.08 mm N/A -519
BS519 B-90 N/A
184410 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.553 in39.45 mm N/A 0.003 in0.08 mm N/A -519
BS517 B-70 N/A
184411 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 70 N/A 1.428 in36.27 mm N/A 0.003 in0.08 mm N/A -517
BS517 B-90 N/A
184412 		N/A BS Standard O-Ring N/A Buna N/A 0.070 in1.78 mm N/A 90 N/A 1.428 in36.27 mm N/A 0.003 in0.08 mm N/A -517
BS475 B-70 N/A
184413 		N/A BS Standard O-Ring N/A Buna N/A 0.275 in6.99 mm N/A 70 N/A 25.9401 in658.88 mm N/A 0.006 in0.15 mm N/A -475
BS475 B-90 N/A
184414 		N/A BS Standard O-Ring N/A Buna N/A 0.275 in6.99 mm N/A 90 N/A 25.9401 in658.88 mm N/A 0.006 in0.15 mm N/A -475
BS474 B-70 N/A
184415 		N/A BS Standard O-Ring N/A Buna N/A 0.275 in6.99 mm N/A 70 N/A 24.940 in633.48 mm N/A 0.006 in0.15 mm N/A -474
BS474 B-90 N/A
184416 		N/A BS Standard O-Ring N/A Buna N/A 0.275 in6.99 mm N/A 90 N/A 24.940 in633.48 mm N/A 0.006 in0.15 mm N/A -474
BS473 B-70 N/A
184417 		N/A BS Standard O-Ring N/A Buna N/A 0.275 in6.99 mm N/A 70 N/A 23.940 in608.08 mm N/A 0.006 in0.15 mm N/A -473
Unit of Measure
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