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O-Rings


626-006 N70 Buna-N Nitrile 70 U-Cup



$1.31

Quantity Discount Prices
1-35
$1.31
36-229
$1.048
230+
$0.786

  • Model: 626-006-5747
  • 427 in Stock

U-Cup Size: 1/8"ID X 1/4"OD X 1/16"CS

Description - Nitrile Rubber - NBR - Buna-N

On a cost basis, Buna-N, nitrile, or NBR, rubber is the least expensive of the oil resistant elastomers. As a result, nitrile is one of the most widely used rubber materials due to its combination of low cost, resistance to many chemicals, and good physical properties. The acrylonitrile content of this highly polar elastomer provides excellent oil and gas permeation resistance which increases as the level of ACN increases. Nitrile should not be exposed to direct sunlight or moderate to high levels of atmospheric ozone, as rapid deterioration will result. However, NBR will accept many antidegradants, most notably PVC, which offer some degree of improvement of these properties. Nitriles are usually sulfur cured, but peroxide curing is also possible, resulting in improved compression set.

Composition

Nitrile Rubber

Physical Properties*

 
Excellent
Good
Fair
Poor
Abrasion resistance
 
 
 
Compression Set
 
 
 
Elongation
 
 
 
Flame resistance
 
 
 
Gas permeability
 
 
 
Low temperature flexibility
 
 
 
Tear resistance
 
 
 
Tensile strength
 
 
 

Chemical Resistance*

 
Excellent
Good
Fair
Poor
Brake fluid
 
 
 
Dilute acids
 
 
 
Dilute alkalis
 
 
 
Hydraulic fluids
 
 
 
Ketones
 
 
 
Ozone
 
 
 
Petroleum oils
 
 
 
Silicone Fluids
 
 
 
Steam
 
 
 
Strong acids
 
 
 
Transmission fluids
 
 
 
Water
 
 
 
Weather
 
 
 

Operating Temperature

-40 to 212°F
*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended.

The O-ring Store is a distributor of O-rings, Seals, Seal Kits, Hydraulic Seals, and Pneumatic seals for many applications. We provide seal products to a variety of industries and customers such as: Automotive, Pool, Spa, Pump, Restaurant, Washer, Hydraulic, Coatings, construction equipment, material handling, industrial plant applications, farming, and logging equipment. We do not imply that these kits are original replacement parts.