HH-I-435B, FEDERAL SPECIFICATION, INSULATOR, ELECTRIC, PORCELAIN AND GLASS (23 AUG 1977) [S/S BY ANSI-C29.1-C29.6]

HH-I-435B, FEDERAL SPECIFICATION, INSULATOR, ELECTRIC, PORCELAIN AND GLASS (23 AUG 1977) [S/S BY ANSI-C29.1-C29.6]., This specification covers toughened glass insulators and glazed and unglazed, wet and dry process, porcelain insulators for use in electrical transmission systems.