AS568-251 Silicone 70 Duro Red FDA O-Ring for 5-1/8 ID X 1/8 CS

Silicone O-Rings 70 Duro Red FDA S700301-251

$ 1.20 per Each

Minimum Order Quantity (MOQ): 25

Ships within 7 days

Qty	Price
25 - 29	$1.2000
30 - 62	$0.9000
63 - 124	$0.7200
125 - 249	$0.5400
250+	$0.4748

Ordering in large quantities? Ask for a lead time quote — we'll get back to you with pricing and lead time.

Product Details

Material	Silicone
Temperature Range	-75°F to 450°F
Cross Sectional Shape	Round
Hardness	70
Dash	251
Fractional	ID: 5-1/8 CS: 1/8 OD: 5-3/8
Actual (Inch)	ID: 5.109 ± 0.035 CS: 0.139 ± 0.004 OD: 5.387
Actual (Metric)	ID: 129.77 ± 0.89 CS: 3.53 ± 0.10 OD: 136.830

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.