N90448

448 O-RING NITRILE (NBR, BUNA)
90 DUROMETER BLACK
CS: .275″ (6.99MM)
ID: 9.475″ (240.67MM)

N90448

Quantity Pricing (ea)
  • 1 for $6.47
  • 20 for $5.82
  • 100 for $5.17
  • 200 for $4.53
  • 400 for $3.88
Stock & Availability (ea)
In Stock: 712
Inbound Stock: 1,000
Qty Available
1,000 11/02/2026
Offsite Stock: 496 ($50 Line Min)
Expedited Shipping*: 06/15/2026
Standard Shipping: 09/02/2026
New Production: Unlimited ($250 Line Min)
Expedited Shipping*: 08/10/2026
Standard Shipping: 10/28/2026
*Add your desired qty and click ADD TO CART to see expedite fees and options.

Informação adicional

Peso 0.08663 lbs
Shipping Dimensions 10.025 × 10.025 × 0.275 in
Material

Color

Size

448
Durometer

Minimum Temperature -13
Maximum Temperature 250

Descrição

Product Drawing: N90448.pdf

SPEC SHEET: Nitrile (Buna) 90 Durometer.pdf

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)