supply of set of thread ring go / no-go gauges for lhb coaches , set of thread ring go / no-go gauges for lhb coaches. one set of go & no-go thread gau ge should have following item : 1) size : m16x2.0 mm pitch (one thread ring gauge go & no-go gauges) - 01 pair. 2) size : m20x2.5 mm pitch (one thread ring gauge go & no-go gauges) - 01 pair. 3) size : m8x 1.25 mm pitch (one thread ring gauge go & no-go gauges) - 01 pair. make/ brand : baker/ insize/ prec ision/ mitutoyo/ master metrology or similar. note :-calibration certificate from nabl accredited lab to be supplied with the gauges. [ warranty period: 30 months after the date of delivery ] ]