1-190

191-225 228-376 377-435 436-699 701-861

862-914

922-964
National Insulator Association (NIA) logo

Threaded Unipart Porcelain Insulators

From the United States

 

Note:  Click on each insulator for larger pictures and more information!

U-862 through U-864 are multi skirted high power insulators

U-864

U-864B

U-865 through U-914 are single part high voltage styles.  These competed directly with the multipart insulators with Jeffery Dewitt as a major supplier. 
   

U-866

U-878

U-893

U-893A

 

U-896

U-908

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191-225 228-376 377-435 436-699 701-861

862-914

922-964

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