supply of set of items required for unloader valve consisting of 02 items. , set of items required for unloader valve consisting of 02 items as follows. (i)zinc coated hexagonal head 1/2 male dummy with leak hole of center dia 8 mm size, total length: 25 mm, hex length: 10 mm, thread length: 12 m m, hex thickness: 26 mm. centre leak hole dia 8 mm. material specification : carbon steel length as per astm a108.gr. 1018. qty/set. = 01 no. (ii) male and female 3/4 adaptor with 0.8 mm leak hole. hex size: 32 mm, length: 45 mm, fema le thread length: 20 mm, male thread length: 12 mm. material specification : carbon steel as per astm a108 grade 101 8. qty/set. = 01 no. note: one sample set should be got approved before effecting bulk supply. [ warranty period: 30 months after the date of delivery ] ]