Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ⑦ Special Thread Taps / Simple Inspection Tools Overall Thread Thread + Neck Shank Size of Length oflengthlengthlengthdia.squaresquareLℓℓnDsKℓk ANSI ZELX NI SP STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts and for Nickel Base Alloys ① Size Class Code Chamfer L (inch) ℓ(inch) ℓn(inch) Ds(inch) K(inch) ℓk(inch) No. offlutes TYPENo.10-24UNCGH2Y874123P2.50.43310.2550.1910.31232 No.10-24UNC GH2 Y87012 1.5P 2.5 0.433 1 0.255 0.191 0.312 3 2 No.10-24UNC GH3 Y87428 3P 2.5 0.433 1 0.255 0.191 0.312 3 2 No.10-24UNC GH3 Y87028 1.5P 2.5 0.433 1 0.255 0.191 0.312 3 2 ② No.10-24UNC GH5 Y87445 1.5P 2.5 0.433 1 0.255 0.191 0.312 3 2 No.10-32UNF GH2 Y87413 3P 2.5 0.354 1 0.255 0.191 0.312 3 2 No.10-32UNF GH3 Y87429 3P 2.5 0.354 1 0.255 0.191 0.312 3 2 No.10-32UNF GH3 Y87029 1.5P 2.5 0.354 1 0.255 0.191 0.312 3 2 No.10-32UNF GH5 Y87057 1.5P 2.5 0.354 1 0.255 0.191 0.312 3 2 ③ 1/4-20UNC GH2 Y87448 3P 2.718 0.472 1.125 0.318 0.238 0.375 3 3 1/4-20UNC GH3 Y87458 3P 2.718 0.472 1.125 0.318 0.238 0.375 3 3 1/4-20UNC GH3 Y87058 1.5P 2.718 0.472 1.125 0.318 0.238 0.375 3 3 1/4-20UNC GH5 Y87090 1.5P 2.718 0.472 1.125 0.318 0.238 0.375 3 3 1/4-28UNF GH2 Y87449 3P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 ④ 1/4-28UNF GH2 Y87059 1.5P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 1/4-28UNF GH3 Y87459 3P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 1/4-28UNF GH5 Y87091 1.5P 2.718 0.394 1.125 0.318 0.238 0.375 3 3 5/16-18UNC GH2 Y87060 1.5P 2.937 0.551 1.25 0.381 0.286 0.437 3 3 ⑤ 5/16-18UNC GH3 Y87460 3P 2.937 0.551 1.25 0.381 0.286 0.437 3 35/16-18UNCGH4Y874703P2.9370.5511.250.3810.2860.43733 5/16-24UNF GH2 Y87451 3P 2.937 0.394 1.25 0.381 0.286 0.437 3 3 5/16-24UNF GH3 Y87461 3P 2.937 0.394 1.25 0.381 0.286 0.437 3 3 5/16-24UNF GH3 Y87061 1.5P 2.937 0.394 1.25 0.381 0.286 0.437 3 3 ⑥ 3/8-16UNC GH3 Y87462 3P 3.375 0.63 - 0.367 0.275 0.437 3 4 3/8-16UNC GH3 Y87062 1.5P 3.375 0.63 - 0.367 0.275 0.437 3 4 3/8-16UNC GH4 Y87472 3P 3.375 0.63 - 0.367 0.275 0.437 3 4 3/8-24UNF GH2 Y87453 3P 3.156 0.472 - 0.323 0.242 0.406 3 4 3/8-24UNF GH2 Y87063 1.5P 3.156 0.472 - 0.323 0.242 0.406 3 4 ⑦ 3/8-24UNF GH3 Y87463 3P 3.156 0.472 - 0.323 0.242 0.406 3 4 3/8-24UNF GH5 Y87085 1.5P 3.156 0.472 - 0.323 0.242 0.406 3 4 7/16-14UNC GH3 Y87464 3P 3.593 0.709 - 0.429 0.322 0.5 3 4 7/16-20UNF GH3 Y87465 3P 3.375 0.472 - 0.367 0.275 0.437 3 4 7/16-20UNF GH3 Y87065 1.5P 3.375 0.472 - 0.367 0.275 0.437 3 4 ⑧ 7/16-20UNF GH4 Y87475 3P 3.375 0.472 - 0.367 0.275 0.437 3 4 1/2-13UNC GH3 Y87466 3P 3.812 0.748 - 0.48 0.36 0.562 3 4 1/2-13UNC GH3 Y87066 1.5P 3.812 0.748 - 0.48 0.36 0.562 3 4 1/2-13UNC GH5 Y87088 1.5P 3.812 0.748 - 0.48 0.36 0.562 3 4 ⑨ 1/2-20UNF GH3 Y87467 3P 3.593 0.512 - 0.429 0.322 0.5 3 41/2-20UNFGH3Y870671.5P3.5930.512-0.4290.3220.534 ⑩ ⑪ ANSI ⑦-17 ※ This product is different from JIS products in shape and dimensions, please be careful when using.