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Buna O-ring Kits

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.

Operating temperature: -40° to +250°F




Image Model+ Item Name Stock Price Quantity Discounts
Buna-N 70 O-ring Kit 200 Piece 12 Sizes K200X12N70

Buna-N 70 O-ring Kit 200 Piece 12 Sizes

200pc Buna-N 70 O-Ring Kit Includes the following AS568 Sizes: 35pc -010 O-Rings 1/4"ID X 3/8"OD X 1/16"CS 35pc -011 O-Rings...
6
$10.00

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Quantity Discounts
1$10.00
2-9$9.00
10+$7.50
OSK™ Standard Buna-N 70 O-ring Kit 382pc 30 Sizes K382X30N70

OSK™ Standard Buna-N 70 O-ring Kit 382pc 30 Sizes

382 Piece Buna-N 70 O-ring Kit This kit contains a total of 382 O-Rings in 30 different sizes, providing an extremely low cost per size value....
13
$15.00  $12.00
Save: 20% off

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Quantity Discounts
1-11$12.00
12-99$10.80
100+$10.20
Industrial Standard Buna-N Duro 70 O-ring Kit 36-Size K436X36N70

Industrial Standard Buna-N Duro 70 O-ring Kit 36-Size

Buna-N 70 Industrial O-ring Kit One of our most useable O-Ring kits. The kit contains a total of 436 O-Rings in 36 different sizes, providing an...
42
$34.00

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Quantity Discounts
1$34.00
2-9$30.60
10+$25.50
450 Piece O-ring Kit Buna-N 70 -003 to -020 K450X18N70-003-020

450 Piece O-ring Kit Buna-N 70 -003 to -020

450 Piece O-Ring Kit This O-ring Kit starts at -003 and goes to -020, 450 o-rings in 18 AS568 Standard sizes. Standard grades of NBR are typically...
7
$14.00

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Quantity Discounts
1$14.00
2-9$12.60
10+$10.50
OSK™ Max Truck O-ring Kit Buna-N 70 and 90 1415pc MAX1381KIT

OSK™ Max Truck O-ring Kit Buna-N 70 and 90 1415pc

OSK™, O-Ring Service Kit Designed for Service Trucks, Shops or Parts Counters Max O-ring Kit includes standard Buna-N 70, Boss B90, and B90...
16
$150.00

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Quantity Discounts
1$150.00
2-9$135.00
10+$112.50
510 Piece O-ring Kit Buna-N 70 25 Sizes - 1/16" C/S MBOX1-K510X25N70

510 Piece O-ring Kit Buna-N 70 25 Sizes - 1/16" C/S

510 Piece Deluxe O-ring Kit - 25 Sizes - 1/16" C/S Standard grades of NBR are typically resistant to mineral oil-based lubricants and greases,...
3
$50.00

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Quantity Discounts
1$50.00
2-9$45.00
10+$37.50
440 Piece O-ring Kit Buna-N 70 24 Sizes - 3/32" C/S MBOX2-K440X24N70

440 Piece O-ring Kit Buna-N 70 24 Sizes - 3/32" C/S

440 Piece Deluxe O-ring Kit - 24 Sizes - 3/32" C/S Standard grades of NBR are typically resistant to mineral oil-based lubricants and greases,...
5
$55.00

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Quantity Discounts
1$55.00
2-9$49.50
10+$41.25
280 Piece O-ring Kit Buna-N 70 19 Sizes - 1/8" C/S MBOX3-K280X19N70

280 Piece O-ring Kit Buna-N 70 19 Sizes - 1/8" C/S

280 Piece Deluxe O-ring Kit - 19 Sizes - 1/8" C/S Standard grades of NBR are typically resistant to mineral oil-based lubricants and greases,...
3
$56.00

Add:

Quantity Discounts
1$56.00
2-9$50.40
10+$42.00
Warehouse O-Ring Kit Buna-N Duro 70 - 1,100 O-rings N70WHSEKIT

Warehouse O-Ring Kit Buna-N Duro 70 - 1,100 O-rings

Warehouse/Retail O-ring Kit Our O-ring Warehouse kit is ideally suited for the repair shop that needs a large on-hand selection of O-rings to insure...
0
$214.21

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Quantity Discounts
1$214.21
2-9$192.79
10+$160.66


Monthly Specials For April

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