ST-4750-4999

Modern compression caps 304mm (12") and greater
ST-4760
ST-4760
ST-4760
Size: 342mm (13.5”)
Example in Photo: O-B (USA)
Photo Credit: Mid Norris
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
O-B(O-B Logo) // U.S. PAT'D / 1 - 25 -10 . 11 - 1 - 10 /7 - 17 - 17. / 8960 - 2BrownUSA
ST-4775
ST-4775
ST-4775
Size: 355mm (14")
Example in Photo: CP (Canada)
Photo Credit: Bob Scafe
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
CP(Incuse) (CP Logo) (Year) // (Letter and Numbers)(CP Logo) / 20000 LBSSky GrayCanada
ST-4870
ST-4870
ST-4870
Size: 381mm (15")
Example in Photo: NGK (Japan)
Photo Credit: Mid Norris
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) 111KN M-E/56KN TEST/ (NGK LOGO)/NGK/JAPAN/0159W/2128A // TK/25BrownJapan
ST-4875
ST-4875
ST-4875
Size: 387mm (15.75")
Example in Photo: NGK (Japan)
Photo Credit: Mid Norris
Direct link to this insulator:
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) 70KN/ (NGK LOGO)/NGK/JAPAN/(Year)Japan
ST-4950
ST-4950
ST-4950
Direct link to this insulator:
Size: 431mm (17")
Example in Photo: NGK (Japan)
Photo Credit: Anonymous
ManufacturerInsulator MarkingsCap MarkingsColorCountry
NGK(Under-glaze Ink) SAMPLE/ (NGK LOGO)/NGK/JAPAN/(Year)K36WhiteJapan