Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk IHT Hand Taps for General Purpose 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 For Unified Thread(s In blister package) IAUN6JXHEX5R 5P No.6-32UNC - 2 0.374 0.669 1.201 0.141 0.11 0.187 3 1 IAUN6JXHEX2R 2P IAUN8JXHEX5R 5P (for through hole) Spiral Fluted Taps No.8-32UNC - 2.125 0.374 0.866 1.339 0.168 0.131 0.25 3 1 IAUN8JXHEX2R 2P IAUNAMXHEX5R 5P No.10-24UNC - 2.375 0.512 0.866 1.339 0.194 0.152 0.25 3 1 IAUNAMXHEX2R 2P IAU04NXHEX5R 5P (for through hole) Spiral Pointed Taps 1/4-20UNC - 2.5 0.591 1.024 1.22 0.255 0.191 0.312 3 2 IAU04NXHEX2R 2P IAU05OXHEX5R 5P 5/16-18UNC - 2.718 0.669 1.004 1.378 0.318 0.238 0.375 3 3 IAU05OXHEX2R 2P IAU06PXHEX5R 5P 3/8-16UNC - 2.937 0.748 1.059 1.496 0.381 0.286 0.437 3 3 Hand Taps IAU06PXHEX2R 2P Blister Package Carbide Taps Cemented Roll Taps Simple Inspection Tools Pipe Taps Thread Mills Dies Center Drills Centering Tools ANSI HT-2 253