procurement of spares for instrument air compressors ( chicago pneumatic make ) .total quantity as per nit. , spares for chicago make iac model no. 2hn2t-37-22 , sealing ring ( part no.h1446162 ) , oil wiper ring ( part no. h-1445162 ) , piston half assembly lp side ( part no. 1903011595 ) , piston half assembly hp side. ( part no. 1903011495 ) , air cylinder assembly ( lp side ) dia-370 ( part no. z1657163 ) , air cylinder assembly for hp side ( 220mm dia ) ( part no.z1658163 ) , dischargevalve assembly ( l.p. side ) ( part no.z2556164 ) , dischargevalve assembly for ( hp side ) ( part no.z2556164 ) , discharge valve cover ( part no c0222164 ) , piston rod ( part no. b4229163 ) , big end bearing ( part no. c9126162 ) , main bearing 1set =3 no. ( part no. m-5480162 ) , nrv 80 nb plate type ( part no.-1903037113 ) , valve plate ( part no.e2229164 ) , buffer plate ( part no. e2230164 ) , suction filter element / air cleaner kit ( 1 set= 3 no ) ( part no.z6207933 ) , lube filter k-0601102 ( part no. c6714162 ) , inter cooler ( part no.-k0489164 ) , after cooler ( part no.-v0493800 ) , valve seat ( suction valve ) ( part no. z2120163 ) , valve seat for discharge valve , lock pin dia 3.2x6l ( part no. m4847164 ) , split pipe 3.2mm discharge valve assembly m5109150 , o ring for piston for suction valve , piston nut part no. c6714165