Ordered as V70309, this is an AS568-309 black Viton® (FKM) 75 Shore A O-Ring built to an inside diameter of 0.412 in (10.46 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 0.832 in (21.13 mm). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
It resists engine and transmission fluids, aromatic hydrocarbons, and many acids. Viton® (FKM) offers excellent resistance to compression set and permeation, the industry benchmark where nitrile reaches its thermal limit. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where ketones and esters or amines are present.
You will find this material specified across oil and gas, high-temperature process equipment, and aerospace.
Stocked as V70309 and sold individually. Unit weight is approximately 2.0441 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -309 BLACK FKM 75D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 0.412 inch (10.46 mm)
Actual Outside Diameter 0.832 inch (21.13 )
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity