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8.4mm CS

Buna-N (Nitrile) Metric O-Rings 90 Duro Recommended uses: 

General purpose sealing, Petroleum oils and fluids, Hydraulic fluids, Cold Water, Silicone greases and oils, Di-ester base lubricants (MIL-L-7808), Ethylene glycol base fluids (Hydrolubes). Operating temperature: -40° to +250F°

Size not listed, special requirements or large quantities please click this link to Request a Price Quote.




Image Model+ Item Name Stock Price Quantity Discounts
8.4mm X 149.5mm Buna-N 90 Metric O-ring (JIS P150A-N90) H8.40X149.5

8.4mm X 149.5mm Buna-N 90 Metric O-ring (JIS P150A-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$8.80

Add:
Min:  23
Quantity Discounts
23-53$8.80
54-340$6.60
341+$4.40
8.4mm X 154.5mm Buna-N 90 Metric O-ring (JIS P155-N90) H8.40X154.5

8.4mm X 154.5mm Buna-N 90 Metric O-ring (JIS P155-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$8.93

Add:
Min:  23
Quantity Discounts
23-52$8.93
53-335$6.70
336+$4.47
8.4mm X 159.5mm Buna-N 90 Metric O-ring (JIS P160-N90) H8.40X159.5

8.4mm X 159.5mm Buna-N 90 Metric O-ring (JIS P160-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$8.99

Add:
Min:  23
Quantity Discounts
23-51$8.99
52-333$6.74
334+$4.50
8.4mm X 164.5mm Buna-N 90 Metric O-ring (JIS P165-N90) H8.40X164.5

8.4mm X 164.5mm Buna-N 90 Metric O-ring (JIS P165-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$9.29

Add:
Min:  22
Quantity Discounts
22-50$9.29
51-322$6.97
323+$4.65
8.4mm X 169.5mm Buna-N 90 Metric O-ring (JIS P170-N90) H8.40X169.5

8.4mm X 169.5mm Buna-N 90 Metric O-ring (JIS P170-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$9.59

Add:
Min:  21
Quantity Discounts
21-48$9.59
49-312$7.19
313+$4.80
8.4mm X 174.5mm Buna-N 90 Metric O-ring (JIS P175-N90) H8.40X174.5

8.4mm X 174.5mm Buna-N 90 Metric O-ring (JIS P175-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$9.72

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Quantity Discounts
1-48$9.72
49-308$7.29
309+$4.86
8.4mm X 179.5mm Buna-N 90 Metric O-ring (JIS P180-N90) H8.40X179.5

8.4mm X 179.5mm Buna-N 90 Metric O-ring (JIS P180-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.17

Add:
Min:  20
Quantity Discounts
20-45$10.17
46-294$7.63
295+$5.09
8.4mm X 184.5mm Buna-N 90 Metric O-ring (JIS P185-N90) H8.40X184.5

8.4mm X 184.5mm Buna-N 90 Metric O-ring (JIS P185-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.27

Add:
Min:  20
Quantity Discounts
20-45$10.27
46-292$7.70
293+$5.14
8.4mm X 189.5mm Buna-N 90 Metric O-ring (JIS P190-N90) H8.40X189.5

8.4mm X 189.5mm Buna-N 90 Metric O-ring (JIS P190-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.34

Add:
Min:  20
Quantity Discounts
20-45$10.34
46-290$7.76
291+$5.17
8.4mm X 194.5mm Buna-N 90 Metric O-ring (JIS P195-N90) H8.40X194.5

8.4mm X 194.5mm Buna-N 90 Metric O-ring (JIS P195-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.39

Add:
Min:  20
Quantity Discounts
20-44$10.39
45-288$7.79
289+$5.20
8.4mm X 199.5mm Buna-N 90 Metric O-ring (JIS P200-N90) H8.40X199.5

8.4mm X 199.5mm Buna-N 90 Metric O-ring (JIS P200-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.63

Add:
Min:  19
Quantity Discounts
19-43$10.63
44-282$7.97
283+$5.32
8.4mm X 204.5mm Buna-N 90 Metric O-ring (JIS P205-N90) H8.40X204.5

8.4mm X 204.5mm Buna-N 90 Metric O-ring (JIS P205-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$10.86

Add:
Min:  19
Quantity Discounts
19-42$10.86
43-276$8.15
277+$5.43
8.4mm X 208.5mm Buna-N 90 Metric O-ring (JIS P209-N90) H8.40X208.5

8.4mm X 208.5mm Buna-N 90 Metric O-ring (JIS P209-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$11.21

Add:
Min:  18
Quantity Discounts
18-41$11.21
42-267$8.41
268+$5.61
8.4mm X 209.5mm Buna-N 90 Metric O-ring (JIS P210-N90) H8.40X209.5

8.4mm X 209.5mm Buna-N 90 Metric O-ring (JIS P210-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$11.26

Add:
Min:  18
Quantity Discounts
18-41$11.26
42-266$8.45
267+$5.63
8.4mm X 214.5mm Buna-N 90 Metric O-ring (JIS P215-N90) H8.40X214.5

8.4mm X 214.5mm Buna-N 90 Metric O-ring (JIS P215-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$11.28

Add:
Min:  18
Quantity Discounts
18-41$11.28
42-265$8.46
266+$5.64
8.4mm X 219.5mm Buna-N 90 Metric O-ring (JIS P220-N90) H8.40X219.5

8.4mm X 219.5mm Buna-N 90 Metric O-ring (JIS P220-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$11.73

Add:
Min:  18
Quantity Discounts
18-39$11.73
40-255$8.80
256+$5.87
8.4mm X 224.5mm Buna-N 90 Metric O-ring (JIS P225-N90) H8.40X224.5

8.4mm X 224.5mm Buna-N 90 Metric O-ring (JIS P225-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$11.81

Add:
Min:  17
Quantity Discounts
17-39$11.81
40-254$8.86
255+$5.91
8.4mm X 229.5mm Buna-N 90 Metric O-ring (JIS P230-N90) H8.40X229.5

8.4mm X 229.5mm Buna-N 90 Metric O-ring (JIS P230-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
77
$11.85

Add:
Min:  26
Quantity Discounts
26-39$11.85
40-253$8.89
254+$5.93
8.4mm X 234.5mm Buna-N 90 Metric O-ring (JIS P235-N90) H8.40X234.5

8.4mm X 234.5mm Buna-N 90 Metric O-ring (JIS P235-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
0
$12.29

Add:
Min:  17
Quantity Discounts
17-37$12.29
38-244$9.22
245+$6.15
8.4mm X 239.5mm Buna-N 90 Metric O-ring (JIS P240-N90) H8.40X239.5

8.4mm X 239.5mm Buna-N 90 Metric O-ring (JIS P240-N90)

Metric O-rings - Cross Section "CS" X Inside Diameter "ID" Nitrile, Buna-N O-Rings (NBR): Nitrile, also known as Buna-N or NBR,...
74
$12.17

Add:
Min:  25
Quantity Discounts
25-38$12.17
39-246$9.13
247+$6.09


What are the most common O-ring compounds?

We stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Buna-N O-Rings / Nitrile O-Rings / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.
AS-568 Buna-N O-Rings | Metric Buna-N O-Rings

Viton® O-Rings / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.
AS-568 Viton® O-Rings | Metric Viton® O-Rings

Ethylene-Propylene / EPDM O-Rings: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.
AS-568 EPDM O-Rings | Metric EPDM O-Rings

Silicone O-Rings / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.
AS-568 Silicone O-Rings | Metric Silicone O-Rings

Neoprene® O-Rings / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.
AS-568 Neoprene® O-Rings