FS70338 is an AS568-338 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring with an inside diameter of 3.1 in (78.74 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.52 in (89.41 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.
This material stands up to petroleum oils, ozone and weathering, and extreme cold. Fluorosilicone (FVMQ) is specified for a very wide service temperature range and silicone's low-temperature flexibility combined with fuel resistance. Continuous operating temperature is published at -80°F (-62.2°C) to 350°F (176.7°C).
Typical settings include military ground vehicles, high-altitude equipment, and aviation fuel systems.
Order part number FS70338, sold individually. Nominal inside diameter is listed as 3 1/8 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.
Description *568-338 FLUOROSILICONE 70 DURO ORINGS
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 3.1 inch (78.74 mm)
Actual Outside Diameter 3.52 inch (89.41 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium