-390 BROWN FKM 75D O-RING

Part number VB75390 is an AS568-390 brown Viton® (FKM) 75 Shore A O-Ring measuring an inside diameter of 20.953 in (532.21 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 21.373 in (542.87 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Viton® (FKM) is specified here for very low compression set at elevated temperature and outstanding high-temperature capability. The material holds up against engine and transmission fluids, aggressive chemicals, and petroleum oils and fuels. Published continuous service range is -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in ketones and esters or hot water and steam.

Maintenance and OEM teams specify it across semiconductor equipment, aerospace, and high-temperature process equipment.

Reference part number VB75390 when ordering; the item is sold individually. Unit weight is approximately 76.346 g and nominal inside diameter is listed as 21 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.