Unipart Porcelain Insulators - U (Unipart)

U
Unipart Porcelain Insulators from United States
U-2-43 - Pony styles with one skirt & wire groove
U-46-76 - Exchange styles with one skirt & two or more wire grooves
U-81-100 - Through pin hole styles including mine and transposition insulators
U-104-180 - Telephone & telegraph styles
U-181-190 - Specialty styles including no-tie designs
U-191-225 - Telephone transposition styles
U-228-274 - Side tie styles with no extended skirt, most are also signal styles
U-277-337 - Side tie styles with extended inner skirts, most are also signal styles
U-339-339C - Through hole styles and all scarce to rare. The intended use is not known.
U-340-376 - Larger side tie styles
U-377-395 - Side tie styles with no extended skirt, most are also signal styles
U-396-400 - Double groove side tie styles also known as loop insulators
U-401-408 - Heavy cable top groove insulators
U-410-435 - Top groove power insulators
U-436-535 - Cable top styles with a ridged skirt
U-537-700 - Cable top styles with a rounded skirt
U-701-775 - Cable top styles with two inner skirts
U-776-805 - Hi-top styles
U-807-844 - Ridged skirt styles similar to post insulators
U-846-861 - Fog bowl styles designed for use in wet or contaminated climates
U-862-864 - Multi skirted high power insulators
U-865-914 - Single part high voltage styles
U-922-937 - Early classic styles including many glaze-weld versions
U-938-946 - More classic styles including small glaze-weld units and extended skirt "Mershon" styles
U-949-969 - Glaze-welded units that resemble multipart styles
U-970-994 - Threadless unipart pintype insulators from the United States
U-995-999 - Miscellaneous pintype insulators from the United States

Unipart Porcelain Insulators from outside United States
U-1101-1197
U-1202-1294
U-1311-1397
U-1402-1497
U-1500-1595
U-1600-1696
U-1700-1792
U-1801-1895
U-1907-1996
U-2000-2097
U-2121-2137
U-2200-2294
U-2301-2398
U-2402-2499
U-2503-2598
U-2611-2694
U-2701-2778
U-2801-2898
U-2901-2991
U-3001-3090
U-3101-3141

U-Unlisted - No U is yet assigned

Range

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