Size:4-Inch to 3-Inch Product description 4" - 3" Reducing Washer, Galvanized Steel From the Manufacturer The Bridgeport Fittings 1090-8 4- to 3-Inch Galvanized Steel Reducing Washer is used on rigid conduit/IMC. It has a 4-Inch large end trade size and a 3-Inch small end trade size. Also, it has a 5-1/2-Inch diameter. CSA approved UL 514-B. Bridgeport Fittings, Inc. was founded by Adelbert R. Auray and Neil G. Hayes in 1925 as The Bridgeport Switch Company. Initially, the product line consisted of electrical switches, bells, buzzers, wall switches and receptacles. The company shifted manufacturing direction in 1936, when it was decided to emphasize conduit and cable fittings for the electrical industry. Malleable iron, steel, aluminum and brass fittings replaced the original residential electrical components. Later, in 1948, the company changed its name to Bridgeport Fittings, Inc.
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