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ANSI & BS Spindle of pin type insulators for high voltage Fig No. Main Dimension in (mm) Mechianical strength (KN)  ClassANSI Weight kg H D h h1 h2 a d1 1 330 76 178 51 76 20 11 56-1 1.9 1 356 76 178 51 76 34.9 20 9 56-2 2.2 1 4.7 89 178 51 76 34.9 20 10 56-3 2.5 1 432 89 178 51 76 34.9 20 9 56-4 3.25 1 343 45 165 51 76 34.9 20 6 56-2 1.6 2 198 76 45 51 40 34.9 20 11                   1.54 2 223 76 45 51 40 34.9 20 9 56-2 1.87 2 274 89 45 51 40 34.9 20 10 56-3 2.17 2 299 89 45 51 40 34.9 20 9 56-4 2.7 2 223 45 45 51 40 34.9 20 6 56-2 1.3 1 356 76 76 51 76 34.9 16 5 56-2 1.9 3 305 38 140 74 44.45 20 5 BS small steel 1 3 352 41 127 80 44.45 18.29 22 5 1.2 3 215 38 50 44 44.45 18.29 20 5 0.75 4 261 60 46 47 41 22 10 BS large steel 1.5 4 369 61 140 47 78 27.78 22 10 2