Roll Tap Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk N-RZ Thread Forming Taps for Steels Spiral Fluted Taps (for blind hole) Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk Lobe Type (inch) (inch) (inch) (inch) (inch) (inch) (inch) RSUNAM6HEXP 4P No.10-24UNC H6 2.756 0.551 0.984 1.654 0.194 0.152 0.25 4 2 RSUNAM6HEXB 2P RSUNAJ4HEXP 4P Spiral Fluted Taps (for through hole) H4 RSUNAJ4HEXB 2P No.10-32UNF 2.756 0.551 0.984 1.654 0.194 0.152 0.25 4 2 RSUNAJ6HEXP 4P H6 RSUNAJ6HEXB 2P RSUNCM4HEXP 4P H4 Spiral Pointed Taps (for through hole) RSUNCM4HEXB 2P No.12-24UNC 3.15 0.591 0.984 1.929 0.22 0.165 0.281 4 2 RSUNCM6HEXP 4P H6 RSUNCM6HEXB 2P RSUNCK4HEXP 4P H4 RSUNCK4HEXB 2P Hand Taps No.12-28UNF 3.15 0.591 0.984 1.929 0.22 0.165 0.281 4 2 RSUNCK6HEXP 4P H6 RSUNCK6HEXB 2P RSU04N4HEXP 4P H4 RSU04N4HEXB 2P Cemented Carbide Taps 1/4-20UNC 3.15 0.591 1.181 1.713 0.255 0.191 0.312 4 2 RSU04N6HEXP 4P H6 RSU04N6HEXB 2P RSU04K4HEXP 4P H4 RSU04K4HEXB 2P 1/4-28UNF 3.15 0.591 1.181 1.713 0.255 0.191 0.312 4 2 Roll Taps RSU04K6HEXP 4P H6 RSU04K6HEXB 2P RSU05O5HEXP 4P H5 RSU05O5HEXB 2P 5/16-18UNC 3.543 0.748 1.378 1.831 0.318 0.238 0.375 6 3 RSU05O7HEXP 4P Pipe Taps Simple Inspection Tools H7 RSU05O7HEXB 2P RSU05M5HEXP 4P H5 RSU05M5HEXB 2P 5/16-24UNF 3.543 0.748 1.378 1.831 0.318 0.238 0.375 6 3 RSU05M7HEXP 4P H7 RSU05M7HEXB 2P RSU06P5HEXP 4P H5 RSU06P5HEXB 2P 3/8-16UNC 3.937 0.906 1.535 2.028 0.381 0.286 0.437 6 3 RSU06P7HEXP 4P H7 Thread Mills RSU06P7HEXB 2P RSU06M5HEXP 4P H5 RSU06M5HEXB 2P 3/8-24UNF 3.937 0.906 1.535 2.028 0.381 0.286 0.437 6 3 RSU06M7HEXP 4P H7 Dies RSU06M7HEXB 2P RSU07Q5HEXP 4P H5 RSU07Q5HEXB 2P 7/16-14UNC 3.937 0.906 - 2.008 0.323 0.242 0.406 8 4 RSU07Q7HEXP 4P H7 RSU07Q7HEXB 2P Center Drills RSU07N5HEXP 4P H5 RSU07N5HEXB 2P 7/16-20UNF 3.937 0.906 - 2.008 0.323 0.242 0.406 8 4 RSU07N7HEXP 4P H7 RSU07N7HEXB 2P Centering Tools RSU08R5HEXP 4P H5 RSU08R5HEXB 2P 1/2-13UNC 4.331 1.024 - 2.205 0.367 0.275 0.437 8 4 RSU08R7HEXP 4P H7 RSU08R7HEXB 2P ANSI RO-3 284