supply of set of go and no-go thread ring gauges for lhb coaches , set of go and no-go thread ring gauges for lhb coaches, suitable for inspection of iso me tric external threads. one set shall consist of the following: (a) thread ring gauge go & no-go, size: m16 x 2.0 mm - 6g, qty: 01 pair. (b) thread ring gauge go & no-go, size: m20 x 2.5 mm - 6g, qty: 01 pair. (c) thread ring gauge go & no-go, size: m8 x 1.25 mm - 6g, qty: 01 pair. the gauges shall be manufactured from hardened and stabilised alloy tool steel and generally conform to relevant iso/is standards for metric thread gauges. each gauge shall be permanently marked with size, pitch, and identification details and sup plied complete with a valid calibration certificate traceable to an nabl-accredited or government-approved laboratory. the validity of the calibration certificate shall cover the date of supply of the material. accepted makes: baker / insize / precision / mitutoyo / master metrology or equivalent reputed oem. [ warranty per iod: 30 months after the date of delivery ] ]