SETS OF SPARES FOR MODIFIED EARTHING SWITCH ARRANGEMENT OF CONVENTIONAL ELECTRIC LOCOS AS PER MODIFICATION SHEET NO. RDSO/ 2012/ EL/ MS/ 0405 ( REV 0 ) DATED 03, 01. 2012 ONE SET CONSIST OF 02 ITEMS. ( 1 ) MODIFIED BRACKET FOR HOM FIXED CONTACT JAW RDSO DRG. NO. SKEL- 4872 ALT ' O ' QTY = 02 NOS ( 2 ) COPPER BLOCK SIZE 55X32 MM THICKNESS 25 MM ( A ) M6 X 50 MM BOLTS WITH NUTS & WASHERS ( B ) RDSO DRG. NO. SKEL- 487. A ALT ' O ' QTY A = 02 NOS. B = 04 NOS.