Threaded Unipart Porcelain Insulators From the United States

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

U-2 through U-43 are pony styles with one skirt & wire groove

U-2 U-3A U-4 U-6 U-9 U-10 U-11 U-11A U-11B U-11C U-12 U-12A U-13 U-14 U-14A

U-14B U-15 U-15A U-15B U-17 U-17A U-18 U-18A U-18B U-19 U-21 U-22 U-26 U-28 U-29

U-30 U-31 U-31A U-32 U-33 U-35 U-36 U-39 U-39A U-40 U-40A U-41 U-42 U-42A U-43

U-46 through U-76 are exchange styles with one skirt & two or more wire grooves

U-47 U-48 U-49 U-50 U-52 U-52A U-52B U-53 U-54 U-55 U-56 U-57 U-58

U-60 U-61 U-62 U-64 U-65 U-65A U-66 U-67 U-68 U-70 U-73 U-74 U-75 U-76

U-81 through U-100 are through pin hole styles including mine and transposition insulators

U-81 U-84 U-85 U-89 U-89A U-90 U-91 U-92

U-94 U-97 U-98 U-98A U-98B U-99 U-100

U-104 through U-142 are telephone & telegraph styles with no inner skirt

U-105 U-106 U-106A U-106B U-107 U-108 U-110 U-113 U-114 U-117 U-117A

U-118 U-119 U-120 U-121 U-126 U-108 U-129

U-132 U-133 U-133A U-133B U-134 U-138 U-141

U-143 through U-180 are telephone & telegraph styles with an inner skirt

U-143 U-143A U-143B U-144 U-145 U-146 U-146A U-148

U-149 U-149A U-150 U-150A U-151 U-151A U-152 U-152A U-152B U-153 U-154

U-157 U-158 U-159 U-160 U-164 U-166 U-167 U-168 U-169

U-170 U-171 U-172 U-173 U-175 U-177 U-179 U-180 U-180A U-180B

U-181 through U-190 are specialty styles including no-tie designs

U-181 U-182A/B U-183 U-183A U-184 U-185 U-185A U-186 U-187 U-188 U-189 U-189A U-189B

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