This o-ring is supplied in AS568-239 red Silicone 70 Shore A supplied with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm), catalogued under part number S70MD239. It compresses into its gland to block fluid or gas migration across a joint.
Silicone is specified here for flexibility that holds at very low temperatures and exceptionally wide service temperature range. Expect good resistance to weathering, many oxidizing chemicals, and extreme heat and cold. Continuous operating temperature is published at -80°F (-62.2°C) to 450°F (232.2°C).
The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across pharmaceutical manufacturing, ovens and heated equipment, and electronics and electrical enclosures.
Stocked as S70MD239 and sold individually. Nominal inside diameter is listed as 3 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -239 RED SILICONE 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.609 inch (91.67 mm)
Actual Outside Diameter 3.887 inch (98.73 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable