Tender For supply of material required for civil dept : : - neoprene rubber gasket sheet 6.mm thick , nylon rope general purpose three strand confirming to is-no-4572-1968 , m.s. hex head bolt with nut with standard thread length , m.s.round plain washer as per is-2016 16x30x3 mm , m.s.round plain washer as per is-2016 18x34x3 mm , not return valve pn-16 of size 4inch dia , not return valve pn-16 of size 8inch dia , butterfly valve pn-16 of size 12inch dia