-253 RED SILICONE 70D O-RING

This o-ring is supplied in AS568-253 red Silicone 70 Shore A with an inside diameter of 5.359 in (136.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.637 in (143.18 mm), catalogued under part number S70253. It compresses into its gland to block fluid or gas migration across a joint.

It resists extreme heat and cold, dry heat, and weathering. That behavior comes from the compound itself: Silicone offers an exceptionally wide service temperature range, physiological inertness and low toxicity. Rated temperature range runs from -80°F (-62.2°C) to 450°F (232.2°C) in continuous service. Applications involving hydrocarbon fuels and oils or abrasive dynamic service call for a different compound.

Maintenance and OEM teams specify it across medical devices, sanitary process lines, and food and beverage processing.

Order part number S70253, sold individually. Unit weight is approximately 5.985 g and nominal inside diameter is listed as 5 3/8 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.