AS568-390 Silicone 50 Duro Red FDA O-Ring for 21 ID X 3/16 CS

Silicone O-Rings 50 Duro Red FDA S500301-390

$ 29.16 per Each

Minimum Order Quantity (MOQ): 2

Out of stock

Qty	Price
2 - 2	$21.8700
3 - 5	$18.9540
6 - 10	$16.0380
11 - 20	$13.1220
21+	$11.6640

This item is out of stock. Request a quote and we'll confirm pricing and lead time for your quantity.

Product Details

Material	Silicone
Temperature Range	-75°F to 450°F
Cross Sectional Shape	Round
Hardness	50
Dash	390
Fractional	ID: 21 CS: 3/16 OD: 21-3/8
Actual (Inch)	ID: 20.955 ± 0.095 CS: 0.210 ± 0.005 OD: 21.375
Actual (Metric)	ID: 532.21 ± 2.41 CS: 5.33 ± 0.13 OD: 542.870

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.