Procurement of washer as per drg no ofbh sk 1574 supplier should submit material test certificate from nabl or govt lab , spigot as per drg no ofbh sk 1571 with 2 nos of hexagonal thin nut chamfered m12x1 25 is 1364 pt4 supplier should submit material test certificate from nabl or govt lab , pin b assembly as per drg no ofbh sk 1576 with one split cutter pin 2 5x14 is 549 and punched washer m7 is 2016 each for pin b supplier should submit material test certificate from nabl or govt lab and other related items