246 O-RING NITRILE (NBR, BUNA)
70 DUROMETER BLACK
NSF 61 APPROVED
CS: .139″ (3.53MM)
ID: 4.484″ (113.89MM)

N70246NSF

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Stock entrant: 0
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Nouvelle production: illimitée ($250 Ligne Min)
Expédition accélérée*: 07/11/2024
Expédition standard: 09/30/2024
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Informations complémentaires

Poids 0.00992 livres
Shipping Dimensions 4.762 × 4.762 × 0.139 pouce
Material

Color

Durometer

Size

246

Description

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)