APG stocks the FS70243, an AS568-243 blue Fluorosilicone (FVMQ) 70 Shore A O-Ring with an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
This material stands up to chlorinated solvents, ozone and weathering, and extreme cold. Fluorosilicone (FVMQ) is specified for excellent ozone and UV stability, silicone's low-temperature flexibility combined with fuel resistance. The material carries a published service range of -80°F (-62.2°C) to 350°F (176.7°C). Verify compatibility before use with high-temperature dynamic service or hydrazine.
It sees regular use in aerospace and defense, high-altitude equipment, and aviation fuel systems.
This item is sold individually under part number FS70243. Nominal inside diameter is listed as 4 1/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Description *568-243 FLUOROSILICONE 70 DURO ORINGS
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.109 inch (104.37 mm)
Actual Outside Diameter 4.387 inch (111.43 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium