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Spiral Pointed Taps: Optional Thread Limits  E-mail this product to a friend previous | up | next  High Speed Steel Ground Thread Partial listing, inquire for additional sizes.   FRACTIONAL SIZES Size Threads Per Inch Thread Limits No. of Flutes EDP No. 1/4 20 H2 2 310176 1/4 28 H4 2 310177 5/16 18 H1 2 310178 5/16 24 H2, H4 2 310179 5/16 24 H5, H7 2 310180 3/8 16 H1 3 310181 3/8 16 H5 3 310182 3/8 24 H1 2 310183 3/8 24 H2 3 310184 7/16 14 H5 3 310185 1/2 13 H1 3 310186 1/2 20 H5 3 310187 5/8 11 H5 3 310188 1 8 H6 3 310189 MACHINE SCREW SIZES Size Threads Per Inch Thread Limits No. of Flutes EDP No. 2 56 H3 2 310190 2 64 H1 2 310191 3 48 H1 3 310192 3 56 H1 2 310193 4 40 H1, H4 2 310194 4 48 H1 2 310195 5 44 H1 3 310196 6 32 H1 2 310197 8 36 H3 2 310198 10 24 H1 2 310199 10 24 H2, H5 2 310200 10 32 H1, H4, H5 2 310201 12 24 H2 2 310202 12 28 H2 2 310203