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Hemingray-40 Aqua-Green Vintage Glass Insulator

Hemingray-40 Aqua-Green Vintage Glass Insulator

Regular price $14.00 CAD
Regular price Sale price $14.00 CAD
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Aqua-Green Hemingray-40

The Hemingray №40 was a very common and popular style, and was mass produced in aqua and green colors. In c.1910, an experiment with AT&T to produce a new standard insulator resulted in this design being selected. It was produced in mass quantities until 1921, when the Hemingray №40 was replaced by the extremely popular Hemingray - 42 (CD 154).

Note: The insulators a free of any major cracks but might have some minor nicks/chips.

Use this insulator with my indoor lamp base or my low voltage landscape light base.

We also have gift certificates available for your friends.


Insulator diameter: 3.5 inches

Height:4.0 inches

CD Number

CD 152


Hemingray Glass Company is the best known and was the most prolific glass insulator manufacturer in the world. Although best known for their electrical insulators, Hemingray also produced many other glass items, including bottles, fruit jars, pressed glass tableware, syrup pitchers (“molasses cans”) in milk glass and other colors, tumblers, battery jars, fish bowls, lantern globes, kerosene oil lamps, and much, much more.

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  • Glass Insulators

    Glass insulators were first produced in the 1850's for use with telegraph lines. As technology developed insulators were needed for telephone lines, electric power lines, and other applications. In the mid 1960's a few people began collecting these antique glass insulators. Today there are over 3,000 insulator collectors.


    All glass pintype insulators are classified in what is called the “CD Numbering” system of identification. This system was created and used by N.R. “Woody” Woodward, an early pioneer, researcher and author in the field of collecting glass insulators. The CD (Consolidated Design) numbers basically identify insulators by their shape and profile, regardless of exact embossed markings, glass color, or base type.