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 eared cable styles

U-377 U-379 U-380 U-380A U-381 U-383 U-384 U-384A U-384B U-386

U-387 U-388 U-388A U-389 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-396 U-397 U-397A U-397B U-398 U-399

U-399A U-399B U-399C U-400 U-400A U-400B

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

U-401 U-401A U-401B U-401C U-402 U-402A U-403 U-403A

U-403B U-406A U-407 U-407A U-408 U-408A

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

U-410 U-411 U-412 U-412A U-414 U-416 U-418

U-419 U-421 U-425 U-425A U-425B U-431

U-432 U-432A U-433 U-433A U-433B

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