Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk SP OX Spiral Fluted Taps,Oxided Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type (for blind hole) Spiral Fluted Taps (inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes GH5 SSU08N5NEX 1/2-20UNF 2.5P 4.331 1.024 - 2.205 0.367 0.275 0.437 3 4 GH11 SSU08N-EEX GH3 SSU09S3NEX 9/16-12UNC GH4 SSU09S4NEX 2.5P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 4 (for through hole) Spiral Fluted Taps GH5 SSU09S5NEX GH3 SSU09O3NEX 9/16-18UNF GH4 SSU09O4NEX 2.5P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 4 GH5 SSU09O5NEX (for through hole) Spiral Pointed Taps GH3 SSU10U3NEX GH4 SSU10U4NEX 5/8-11UNC 2.5P 4.331 1.024 - 2.205 0.48 0.36 0.562 3 4 GH5 SSU10U5NEX GH11 SSU10U-EEX GH3 SSU10O3NEX Hand Taps GH4 SSU10O4NEX 5/8-18UNF 2.5P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 4 GH5 SSU10O5NEX GH11 SSU10O-EEX GH3 SSU12V3NEX Carbide Taps Cemented 3/4-10UNC GH5 SSU12V5NEX 2.5P 4.921 1.299 - 2.52 0.590 0.442 0.687 4 4 GH11 SSU12V-EEX GH3 SSU12P3NEX GH4 SSU12P4NEX 3/4-16UNF 2.5P 4.921 1.299 - 2.52 0.590 0.442 0.687 4 4 Roll Taps GH5 SSU12P5NEX GH11 SSU12P-EEX GH4 SSU14W4NEX 7/8-9UNC GH5 SSU14W5NEX 2.5P 5.512 1.299 - 2.795 0.697 0.523 0.75 4 4 GH6 SSU14W6NEX Simple Inspection Tools Pipe Taps GH3 SSU14Q3NEX 7/8-14UNF GH4 SSU14Q4NEX 2.5P 5.512 1.299 - 2.795 0.697 0.523 0.75 4 4 GH6 SSU14Q6NEX GH4 SSU16X4NEX 1-8UNC GH5 SSU16X5NEX 2.5P 6.299 1.457 - 3.228 0.800 0.6 0.812 4 4 GH6 SSU16X6NEX GH3 SSU16S3NEX GH4 SSU16S4NEX 1-12UNF 2.5P 6.299 1.457 - 3.228 0.800 0.6 0.812 4 4 Thread Mills GH5 SSU16S5NEX GH6 SSU16S6NEX GH4 SSU18Y4NEX 1 1/8-7UNC 2.5P 7.087 1.732 - 3.622 0.896 0.672 0.875 4 4 GH6 SSU18Y6NEX GH4 SSU18S4NEX Dies 1 1/8-12UNF 2.5P 7.087 1.732 - 3.622 0.896 0.672 0.875 4 4 GH5 SSU18S5NEX GH4 SSU20Y4NEX 1 1/4-7UNC 2.5P 7.087 1.929 - 3.622 1.021 0.766 1 4 4 GH6 SSU20Y6NEX GH4 SSU20S4NEX 1 1/4-12UNF 2.5P 7.087 1.929 - 3.622 1.021 0.766 1 4 4 Center Drills GH5 SSU20S5NEX GH5 SSU22Z5NEX 1 3/8-6UNC 2.5P 7.874 2.165 - 4.016 1.108 0.831 1.062 4 4 GH6 SSU22Z6NEX GH4 SSU22S4NEX 1 3/8-12UNF 2.5P 7.874 2.165 - 4.016 1.108 0.831 1.062 4 4 GH5 SSU22S5NEX Centering Tools GH5 SSU24Z5NEX 1 1/2-6UNC 2.5P 7.874 2.323 - 4.016 1.233 0.925 1.125 4 4 GH6 SSU24Z6NEX GH4 SSU24S4NEX 1 1/2-12UNF 2.5P 7.874 2.323 - 4.016 1.233 0.925 1.125 4 4 GH5 SSU24S5NEX ANSI SP-8 195