Ordered as SV70339, this is an AS568-339 black Viton® (FKM) 70 Shore A square profile Quad-Ring with an inside diameter of 3.225 in (81.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.645 in (92.58 mm). The quad-ring provides a dual sealing band on each contact face for improved reliability.
As a material, Viton® (FKM) offers the industry benchmark where nitrile reaches its thermal limit, excellent resistance to compression set and permeation. This material stands up to aromatic hydrocarbons, petroleum oils and fuels, and chlorinated solvents. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Verify compatibility before use with hot water and steam or ketones and esters.
Typical settings include automotive fuel systems, semiconductor equipment, and chemical processing.
Reference part number SV70339 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 1/4 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.
description 568-339 FKM 75 SQUARE CUT RINGS
Actual_CS 0.21 inch (5.33 mm)
Actual_ID 3.225 inch (81.92 mm)
Actual_OD 3.645 inch (92.58 mm)
ProductCode Description O-Rings - Square/Quad - Commodity