Fine grinding flat nose pliers are generally made of alloy tool steel; The general processing flow is as follows: forging-annealing-milling (leaving finishing allowance)-marking by fitter-milling by fitter-drilling and tapping by fitter-quenching-rough grinding-aging-fine grinding-fitter assembly; Lead screw of flat-nose pliers; Lathe rough turning forming-quenching and tempering-lathe finish turning forming-finish turning thread (thread grinding lead screw).