Procurement of Set of spares consisting of Six items for High pressure cylinder head sub assembly of ELGI make water cooled air compressor of Model RR66101W in HHP Diesel Locomotives as details given below. ( 1 ) HP suction valve ( IM ) to ELGI Pt. No. B013901070008- Qty. 01 No. ( 2 ) HP Disc valve ( IM ) to ELGI Pt. No. B013901070009- Qty. 01 No. ( 3 ) Valve plug HP suction M/ C to ELGI Pt. No. 070311210- Qty. 01 No. ( 4 ) Valve plug HP delivery MOD to ELGI Pt. No. 070311550- Qty. 01 No. ( 5 ) Hex Bolt 3/ 8 UNC- 16 x 2- 1/ 4 FT to ELGI Pt. No. 00090734A- Qty. 09 Nos. ( 6 ) Bolt Hex 1/ 2 inch UNC x 1- 1/ 4 inch to ELGI Pt. No. 000907247- Qty. 12 Nos.