Oring Cad
AS568-419 Silicone 70 Duro Red FDA O-Ring for 3-3/4 ID X 1/4 CS

Silicone O-Rings 70 Duro Red FDA S700301-419

$ 6.71 per Each
Minimum Order Quantity (MOQ): 10
On Backorder

Material Silicone
Cross Sectional Shape Round
Hardness 70
Dash 419
Fractional
  • ID: 3-3/4
  • CS: 1/4
  • OD: 4-1/4
Actual (Inch)
  • ID: 3.725 ± 0.028
  • CS: 0.275 ± 0.006
  • OD: 4.275
Actual (Metric)
  • ID: 94.62 ± 0.71
  • CS: 6.99 ± 0.15
  • OD: 108.600

Silicone O-rings are made from a synthetic elastomer composed of silicon, oxygen, hydrogen, and carbon. They are widely used for their excellent flexibility, high-temperature resistance, and exceptional aging properties. Silicone O-rings offer great thermal stability, low toxicity, and resistance to weathering, ozone, and UV exposure, making them ideal for medical, automotive, and food-grade applications. Many silicone compounds are **FDA-compliant**, making them suitable for food and pharmaceutical uses.

Silicone Recommended Uses

Medical and pharmaceutical applications, food and beverage processing, automotive components, aerospace industries, high-temperature sealing applications, and electrical insulation.

Silicone Not Recommended

Petroleum-based oils, fuels, concentrated acids, alkalis, ketones, and steam under high pressure.

Silicone Limitations

  • Not resistant to petroleum-based fluids and fuels.
  • Lower mechanical strength compared to other elastomers.
  • Not ideal for applications requiring high tear and abrasion resistance.
  • Can swell or degrade when exposed to certain chemicals and oils.
Silicone Usable Temperature Range

-85 to 450°F (-65 to 232°C)

Silicone Also Known As

Silicone Rubber, VMQ (Vinyl Methyl Silicone), Polysiloxane.