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-377 through U-395 are side tie styles with no extended skirt, most are also signal styles

U-377

U-379

U-380

U-381

U-383

U-384B

U-387

U-388

U-390

U-392

U-393

U-393A

U-394

U-395

U-396 through U-400 are double groove side tie styles also known as loop insulators

U-399A

U-399B

U-401 through U-408 are heavy cable top groove insulators
   

U-401A

U-407

U-408

U-408A

U-410 through U-435 are top groove power insulators.

U-418C

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