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8.0mm CS

Buna-N / Nitrile Metric O-Rings 70 Duro (NBR):

A general purpose, sulfur-cured Buna-N Nitrile O-Ring, the most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. More than 50% of the Orings sold are Buna-N Nitrile Orings, commonly used in hydraulic/pneumatic motors, cylinders, pumps and valves.

O-Ring Dimensions are defined by the cross section (CS) and the inside diameter (ID).

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
8mm X 25mm Buna-N 70 Metric O-rings N8.00X025

8mm X 25mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$4.41

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Quantity Discounts
1-7$4.41
8-45$3.31
46+$2.21
8mm X 30mm Buna-N 70 Metric O-rings N8.00X030

8mm X 30mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
12
$3.32

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Quantity Discounts
1-10$3.32
11-60$2.49
61+$1.66
8mm X 38mm Buna-N 70 Metric O-rings N8.00X038

8mm X 38mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
48
$4.88

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Quantity Discounts
1-6$4.88
7-40$3.66
41+$2.44
8mm X 40mm Buna-N 70 Metric O-rings N8.00X040

8mm X 40mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$5.43

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Min:  47
Quantity Discounts
47-245$5.43
246-919$4.07
920+$2.72
8mm X 54mm Buna-N 70 Metric O-rings N8.00X054

8mm X 54mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
11
$6.91

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Quantity Discounts
1-4$6.91
5-28$5.18
29+$3.46
8mm X 60mm Buna-N 70 Metric O-rings N8.00X060

8mm X 60mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
3
$7.20

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Quantity Discounts
1-4$7.20
5-27$5.40
28+$3.60
8mm X 92mm Buna-N 70 Metric O-rings N8.00X092

8mm X 92mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
2
$11.22

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Quantity Discounts
1-2$11.22
3-17$8.42
18+$5.61
8mm X 95mm Buna-N 70 Metric O-rings N8.00X095

8mm X 95mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$12.62

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Quantity Discounts
1-2$12.62
3-15$9.47
16+$6.31
8mm X 100mm Buna-N 70 Metric O-rings N8.00X100

8mm X 100mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$8.42

Add:
Min:  30
Quantity Discounts
30-158$8.42
159-593$6.32
594+$4.21
8mm X 132mm Buna-N 70 Metric O-rings N8.00X132

8mm X 132mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$11.24

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Quantity Discounts
1-2$11.24
3-17$8.43
18+$5.62
8mm X 140mm Buna-N 70 Metric O-Rings N8.00X140

8mm X 140mm Buna-N 70 Metric O-Rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$7.75

Add:
Min:  33
Quantity Discounts
33-86$7.75
87-257$5.81
258+$3.88
8mm X 320mm Buna-N 70 Metric O-rings N8.00X320

8mm X 320mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$28.65

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Quantity Discounts
1$28.65
2-9$21.49
10+$14.33
8mm X 425mm Buna-N 70 Metric O-rings N8.00X425

8mm X 425mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$44.07

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Quantity Discounts
1$44.07
2-9$33.05
10+$22.04
8mm X 525mm Buna-N 70 Metric O-rings N8.00X525

8mm X 525mm Buna-N 70 Metric O-rings

Cross Section "CS" X Inside Diameter "ID" Metric O-Rings Buna-N 70 Duro (NBR): The most commonly used elastomer for sealing...
0
$42.92

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Quantity Discounts
1$42.92
2-9$32.19
10+$21.46
150mm to 300mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring VN70.313-012

150mm to 300mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring

150mm ID to 300mm ID / 6" to 12" ID Spliced & Vulcanized O-Rings - Typical lead time is 2-3 days to ship. Spliced and vulcanized...
0
$8.50



Quantity Discounts
1$8.50
2-11$7.65
12+$6.38
5" to 12" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring VN70.313-012

5" to 12" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring

125mm ID to 300mm ID / 5" to 12" ID Spliced & Vulcanized O-Rings - Typical lead time is 3-5 days to ship. Spliced and vulcanized...
0
$8.50



Quantity Discounts
1$8.50
2-9$7.65
10+$6.38
12" to 18" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring VN70.313-018

12" to 18" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring

300mm ID to 450mm ID / 12" to 18" ID Spliced & Vulcanized O-Rings - Typical lead time is 3-5 days to ship. Spliced and vulcanized...
0
$8.75



Quantity Discounts
1$8.75
2-9$7.88
10+$6.56
300mm to 450mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring VN70.313-018

300mm to 450mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring

300mm ID to 450mm ID / 12" to 18" ID Spliced & Vulcanized O-Rings - Typical lead time is 2-3 days to ship. Spliced and vulcanized...
0
$8.75



Quantity Discounts
1$8.75
2-11$7.88
12+$6.56
18" to 24" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring VN70.313-024

18" to 24" ID X 0.313" (8.00mm) C/S Buna-N 70 Vulcanized O-Ring

450mm ID to 600mm ID / 18" to 24" ID Spliced & Vulcanized O-Rings - Typical lead time is 3-5 days to ship. Spliced and vulcanized...
0
$9.00



Quantity Discounts
1$9.00
2-9$8.10
10+$6.75
450mm to 600mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring VN70.313-024

450mm to 600mm ID X 8mm C/S Buna-N 70 Vulcanized O-ring

450mm ID to 600mm ID / 18" to 24" ID Spliced & Vulcanized O-Rings - Typical lead time is 2-3 days to ship. Spliced and vulcanized...
0
$9.00



Quantity Discounts
1$9.00
2-11$8.10
12+$6.75


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