Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk PO Spiral Pointed Taps 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 GH3 PSU10U3NEB GH4 PSU10U4NEB 5/8-11UNC 4.5P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 4 GH5 PSU10U5NEB GH6 PSU10U6NEB (for through hole) Spiral Fluted Taps GH3 PSU10O3NEB 5/8-18UNF GH4 PSU10O4NEB 4.5P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 4 GH5 PSU10O5NEB GH5 PSU12V5NEB (for through hole) Spiral Pointed Taps 3/4-10UNC 4.5P 4.921 1.299 - 2.52 0.590 0.442 0.687 3 4 GH6 PSU12V6NEB GH3 PSU12P3NEB 3/4-16UNF GH4 PSU12P4NEB 4.5P 4.921 1.299 - 2.52 0.590 0.442 0.687 3 4 GH5 PSU12P5NEB GH4 PSU14W4NEB Hand Taps 7/8-9UNC GH5 PSU14W5NEB 4.5P 5.512 1.299 - 2.795 0.697 0.523 0.75 3 4 GH6 PSU14W6NEB GH4 PSU14Q4NEB 7/8-14UNF 4.5P 5.512 1.299 - 2.795 0.697 0.523 0.75 3 4 Carbide Taps Cemented GH6 PSU14Q6NEB GH4 PSU16X4NEB GH5 PSU16X5NEB 1-8UNC 4.5P 6.299 1.457 - 3.228 0.800 0.6 0.812 3 4 GH6 PSU16X6NEB GH7 PSU16X7NEB Roll Taps GH4 PSU16S4NEB 1-12UNF GH5 PSU16S5NEB 4.5P 6.299 1.457 - 3.228 0.800 0.6 0.812 3 4 GH6 PSU16S6NEB GH6 PSU18Y6NEB 1 1/8-7UNC 4.5P 7.087 1.732 - 3.622 0.896 0.672 0.875 4 4 Simple Inspection Tools Pipe Taps GH7 PSU18Y7NEB GH5 PSU18S5NEB 1 1/8-12UNF 4.5P 7.087 1.732 - 3.622 0.896 0.672 0.875 4 4 GH6 PSU18S6NEB GH6 PSU20Y6NEB 1 1/4-7UNC 4.5P 7.087 1.929 - 3.622 1.021 0.766 1 4 4 GH8 PSU20Y8NEB GH5 PSU20S5NEB 1 1/4-12UNF 4.5P 7.087 1.929 - 3.622 1.021 0.766 1 4 4 GH6 PSU20S6NEB GH6 PSU22Z6NEB 1 3/8-6UNC 4.5P 7.874 2.165 - 4.016 1.108 0.831 1.062 4 4 GH8 PSU22Z8NEB Thread Mills GH5 PSU22S5NEB 1 3/8-12UNF 4.5P 7.874 2.165 - 4.016 1.108 0.831 1.062 4 4 GH6 PSU22S6NEB GH6 PSU24Z6NEB 1 1/2-6UNC 4.5P 7.874 2.323 - 4.016 1.233 0.925 1.125 4 4 GH8 PSU24Z8NEB Dies GH5 PSU24S5NEB 1 1/2-12UNF 4.5P 7.874 2.323 - 4.016 1.233 0.925 1.125 4 4 GH7 PSU24S7NEB Center Drills Centering Tools ANSI PO-4 231