supply of supply of one set thread ring gauges , supply of one set thread ring gauges and thread plug gauges consisting of 04 items: 1) thre ad ring gauge go & no go, size m20x2.5mm pitch class 6g, qty: 2 set (one set consist of 2 nos gauges o ne go & one no go) 2) thread ring gauge go & no go, size m16x2.0mm pitch class 6g=2 set (one set c onsist of 2 nos gauge one go & one no go) 3) thread plug gauge go & no go, size m20x2.5mm pitch cla ss 6h=2 nos 4) thread plug gauge go & no go, size m16x2.0mm pitch class 6h=2 nos calibration certific ate with one year validity to be provided from nabl accredited laboratory along with the material. [ warr anty period: 30 months after the date of delivery ] ]