We supply both high speed steel and alloy steel pipe taps according to gost 6227-80. STC190R-4, PIPE TAPS, GOST6227Material; HSS, Ground Thread SizePitchL / l, mmSizePitchL / l, mmK1/162750 / 16K3/41495 / 32K1/82755 / 18K111.1/2110 / 40K1/41865 / 24K1-1/411.1/2120 / 42K3/81875 / 26K1-1/211.1/2140 / 42K1/21485 / 30K211.1/2140 / 45STC190-5, STRAIGHT PIPE TAPSALLOY STEEL, CUT THREADSizePitchL / l, mmSizePitchL / l, mmG1/82855 / 18G1/214125 / 32G/141965 / 25G3/414135 / 32G3/81970 / 25G1/211140 / 40G1/21480 / 32G1/1/411160 / 40G3/41485 / 32G1.1/211160 / 40G11195 / 40G1.3/411195 / 40G211195 / 40