N70034

Stock & Availability

In Stock: 0
Inbound Stock: 1,310,262
Qty Available
495,262 07/27/2022
415,000 07/27/2022
400,000 11/30/2022
Overseas Stock: 1,261 ($50 Line Min)
Expedited Shipping*: 01/31/2022
Standard Shipping: 04/22/2022
New Production: Unlimited ($250 Line Min)
Expedited Shipping*: 05/09/2022
Standard Shipping: 08/05/2022
*Add your desired qty and click ADD TO CART to see expedite fees and options.

Interchange Part Numbers

  • MCMASTER-CARR 9452K122

Additional information

Weight 0.00119 lbs
Shipping Dimensions 2.254 × 2.254 × 0.07 in
Material

Color

Durometer

Description

SPEC SHEET: Nitrile (Buna) 70 Durometer

Nitrile Rubber (NBR)

Material Description

Nitrile rubber (NBR), also known as Buna N, is one of the most commonly used sealing elastomers due to its resistance to petroleum-based fuels and lubricants and its relatively low price. Nitrile elastomers are copolymers of acrylonitrile and butadiene. There are a number of common variations of nitrile compounds.

Acrylonitrile Content

The acrylonitrile (ACN) content of the polymer chains can vary from 18% to 50%. Lower ACN content gives better low-temperature properties but inferior resistance to fuels and polar lubricants. Higher ACN content gives lesser quality low-temperature properties but improved fuels and polar lubricants resistance. Standard NBRs typically have 34% ACN content.

Cure system: Sulfur-cured

Standard Nitriles are usually sulfur-cured. Sulfur-cured compounds offer better low-temperature properties but are more prone to hardening with high temperatures. Peroxide-cured nitriles have better heat resistance and lower compression sets but are more expensive and more difficult to process.

Temperature Range:

Standard Low Temp: -40&degC (-40&degF)
Standard High Temp: 100&degC (212&degF)