-388 RED SILICONE 70D O-RING

This o-ring is supplied in AS568-388 red Silicone 70 Shore A with an inside diameter of 18.953 in (481.41 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 19.373 in (492.07 mm), catalogued under part number S70MD388. It compresses into its gland to block fluid or gas migration across a joint.

It resists weathering, dry heat, and ozone and UV exposure. That behavior comes from the compound itself: Silicone is known for physiological inertness and low toxicity, an exceptionally wide service temperature range. The material carries a published service range of -80°F (-62.2°C) to 450°F (232.2°C). It is not the right choice where abrasive dynamic service or hydrocarbon fuels and oils are present.

This item is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across ovens and heated equipment, pharmaceutical manufacturing, and sanitary process lines.

S70MD388 ships individually. Nominal inside diameter is listed as 19 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.