The Best 50 Mm O Ring of 2025 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best 50 Mm O Ring of 2025. Check our ranking below.

2,134 Reviews Scanned

Rank No. #1

uxcell Nitrile Rubber O-Rings 50mm OD 46mm ID 2mm Width, Metric Sealing Gasket for Automotive Machine Plumbing, Pack of 5

[Size] - 50mm Outside Diameter, 46mm Inner Diameter, 2mm Cross-Section Diameter
[Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration
[Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance
[Application] - These small rubber o rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more
[NOTE] - Please confirm the required size and material before purchase, and put it in the right place

Rank No. #2

uxcell Nitrile Rubber O-Rings 54mm OD 50mm ID 2mm Width, Metric Sealing Gasket for Automotive Machine Plumbing, Pack of 10

[Size] - 54mm Outside Diameter, 50mm Inner Diameter, 2mm Cross-Section Diameter
[Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration
[Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance
[Application] - These small rubber o rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more
[NOTE] - Please confirm the required size and material before purchase, and put it in the right place

Rank No. #3

uxcell Nitrile Rubber O-Rings 50mm OD 43mm ID 3.5mm Width, Metric Nitrile Rubber Sealing Gasket for Automotive Machine Plumbing, Pack of 20

[Size] - 50mm Outside Diameter, 43mm Inner Diameter, 3.5mm Cross-Section Diameter
[Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration
[Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance
[Application] - These small rubber o rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more
[NOTE] - Please confirm the required size and material before purchase, and put it in the right place

Rank No. #4

TA-VIGOR 5pcs Nitrile Rubber O-Rings 50mm OD 46mm ID 2mm Width, Metric Nitrile Rubber Sealing Gasket for Automotive or Air Conditioning Repair, Filter, Pump, Water Hose, Engines, Valves

【Specification】You will get 5Pcs Nitrile Rubber O-Rings, 50mm OD 46mm ID 2mm cross-sectional diameter.
【Premium Material】These o rings assorted are made of outstanding nitrile rubber(NBR) with good airtightness and high-temperature resistance, which has high resilience and high tensile strength, not easily torn apart, sturdy and durable for long time use.
【Easy to Use】Soft and flexible o ring, simply snap on, easy to install. Used for sealing gasoline, diesel oil, lubricating oil, water, air, gas, and great for most plumbing, automotive, and general repair needs.
【Wide Applications】The rubber rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more. And can prevent metal-on-metal contact thus protecting wiring, cables passing through firewalls, metal panels, and so on.
【Note】Please confirm the required size and material before purchase, and put it in the right place.

Rank No. #5

uxcell Nitrile Rubber O-Rings 50mm OD 40mm ID 5mm Width, Metric Sealing Gasket for Automotive Machine Plumbing, Pack of 10

[Size] - 50mm Outside Diameter, 40mm Inner Diameter, 5mm Cross-Section Diameter
[Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration
[Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance
[Application] - These small rubber o rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more
[NOTE] - Please confirm the required size and material before purchase, and put it in the right place

Last update on 2025-07-26 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: How to find the size of Metric O rings?

A: Use the metric o-ring size chart to find common metric o-ring sizes by cross section, inside diameter, and outside diameter. In addition to standard metric o-ring sizes, thousands of non-standard metric o-rings sizes are available in stock or can be custom-made within a few weeks, usually without additional tooling fees.

Q: Which is the best material for O rings?

A: Polytetrafluoroethylene (PTFE) O-rings: Temperature & Chemical Resistant PTFE is a popular O-Ring material which is White in color. The PTFE O-Rings for use in applications which require a chemically resistant and non-compressible material. PTFE is the chemically inert of the O-ring materials.

Q: What kind of seal is an O ring?

A: An O-ring is a solid-rubber seal shaped like a dough nut or torus. When compressed between mating surfaces, an O-ring blocks the passage of liquids or gases. O-rings are available in a wide range of standard and non-standard sizes that are suitable for nearly all sealing applications.

Q: What kind of resistance does an O ring have?

A: Fluorocarbon FKM & Viton® O-Rings: Chemical resistant Fluorocarbon FKM O-Rings exhibit exceptional resistance to chemicals, oils, temperature extremes, low compression set, low gas permeability and excellent aging characteristics.