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We are Manufacturers of Thread Ring Gauges and Thread Plug Gauges with brand name "Techavo" , We supplied Trapezoidal Thread Gauges to several Valve manufacturing O.E.M. in India including sizes viz. Tr 8 x 1.5 , Tr 10 x 2 , Tr 12 x 3 , Tr 14 x 4 , Tr 16 x 4 , M18 x23, Tr 24 x 5 , Tr 36 x 6 ,Tr 44 x 7, Tr 50 x 8 , Tr 60 x 9 and several other sizes in various diameter , pitch combinations ,both Right Hand and Left Hand.e can Manufacture Trapezoidal Thread gauges from 8 mm up to 240 mm diameter.