-221 RED SILICONE 70D O-RING

Ordered as S70MD221, this is an AS568-221 red Silicone 70 Shore A O-Ring measuring an inside diameter of 1.421 in (36.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.699 in (43.15 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to extreme heat and cold, weathering, and dry heat. That behavior comes from the compound itself: Silicone is widely chosen for an exceptionally wide service temperature range and flexibility that holds at very low temperatures. Continuous operating temperature is published at -80°F (-62.2°C) to 450°F (232.2°C). Verify compatibility before use with concentrated acids or hydrocarbon fuels and oils.

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

Order part number S70MD221, sold individually. Nominal inside diameter is listed as 1 7/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.