APG stocks the S70256, an AS568-256 red Silicone 70 Shore A O-Ring measuring an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.
Silicone is specified here for very good compression set resistance across its range and excellent electrical insulating properties. Expect good resistance to ozone and UV exposure, many oxidizing chemicals, and dry heat. Rated temperature range runs from -80°F (-62.2°C) to 450°F (232.2°C) in continuous service. It is not the right choice where steam above its rated range or hydrocarbon fuels and oils are present.
Typical settings include medical devices, ovens and heated equipment, and pharmaceutical manufacturing.
Order part number S70256, sold individually. Unit weight is approximately 6.48 g and nominal inside diameter is listed as 5 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description -256 RED SILICONE 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.734 inch (145.64 mm)
Actual Outside Diameter 6.012 inch (152.7 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity