U-1958B: Germany

5 1/4" - 2 3/4" X 6 1/2" (134mm - 70mm X 167mm)

{cap in place}

 

No markings

 

Picture courtesy Mike Doyle

2 3/4" X 5 1/8" (70mm X 130mm)

{cap removed}

 

No markings

 

Picture courtesy Mike Doyle

This is a fuse insulator where the top is threaded to protect an enclosed fuse.

U number assignment by Bob Berry November 2023..


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