Overall Pin Bored hole Bored hole dia. Bored hole Bored hole Shank Size of Length of length length dia(. GO) (NOT-GO) depth(1.5D) depth( 2D) dia. square square L ℓ d₁ d₂ ℓ₁ ℓ₂ Ds K ℓk CPC-T (for blind hole) Spiral Fluted Taps Check Pins for Bored Holes in thread cut tapping (Taper Type) Specification (for through hole) Spiral Fluted Taps ■One CPC-T enables simple checking of bored hole dia. ( for cutting taps, taper type ).CPC-T is made from wear resistant HSS material and is applicable for through hole and for blind hole having enough space in the bottom. For icon explanation, refer to P.50 TYPE:1 TYPE:2 (for through hole) Spiral Pointed Taps Hand Taps Segment:7C Size Code L ℓ d1(inch) d2(inch) ℓ1 ℓ2 Ds K ℓk Type Stock Carbide Taps Cemented (inch) (inch) (Thread engagement ratio)(Thread engagement ratio) (inch) (inch) (inch) (inch) (inch) For Unified Threads No.2-56UNC CPCTAUN2E 1.65 0.28 0.0667(83.1%) 0.0737(53.2%) 0.039 0.236 0.118 0.10 0.20 1 ○ No.2-64UNF CPCTAUN2D 1.65 0.28 0.0691(83.1%) 0.0753(52.8%) 0.039 0.236 0.118 0.10 0.20 1 ○ No.3-48UNC CPCTAUN3F 1.81 0.31 0.0764(83.4%) 0.0845(53.6%) 0.059 0.256 0.118 0.10 0.20 1 ○ Roll Taps No.3-56UNF CPCTAUN3E 1.81 0.31 0.0797(83.1%) 0.0865(53.9%) 0.059 0.256 0.118 0.10 0.20 1 ○ No.4-40UNC CPCTAUN4H 1.81 0.31 0.0849(83.4%) 0.0939(55.7%) 0.059 0.256 0.118 0.10 0.20 1 ○ No.4-48UNF CPCTAUN4F 1.81 0.31 0.0894(83.5%) 0.0968(56.3%) 0.059 0.256 0.118 0.10 0.20 1 ○ No.5-40UNC CPCTAUN5H 1.81 0.33 0.0979(83.4%) 0.1062(57.9%) 0.059 0.276 0.157 0.13 0.24 1 ○ Simple Inspection Tools Pipe Taps No.5-44UNF CPCTAUN5G 1.81 0.33 0.1004(83.2%) 0.1079(58.0%) 0.059 0.276 0.157 0.13 0.24 1 ○ No.6-32UNC CPCTAUN6J 1.81 0.33 0.1040(83.7%) 0.1140(59.2%) 0.059 0.276 0.157 0.13 0.24 1 ○ No.6-40UNF CPCTAUN6H 1.81 0.33 0.1110(83.1%) 0.1186(59.7%) 0.059 0.276 0.157 0.13 0.24 1 ○ No.8-32UNC CPCTAUN8J 2.05 0.41 0.1300(83.8%) 0.1389(61.8%) 0.091 0.327 0.197 0.16 0.28 1 ○ No.8-36UNF CPCTAUN8I 2.05 0.41 0.1340(83.1%) 0.1416(62.1%) 0.091 0.327 0.197 0.16 0.28 1 ○ No.10-24UNC CPCTAUNAM 2.34 0.49 0.1450(83.1%) 0.1555(63.7%) 0.098 0.394 0.217 0.18 0.28 1 ○ No.10-32UNF CPCTAUNAJ 2.34 0.49 0.1560(83.7%) 0.1641(63.8%) 0.098 0.394 0.217 0.18 0.28 1 ○ No.12-24UNC CPCTAUNCM 2.34 0.49 0.1710(83.1%) 0.1807(65.2%) 0.098 0.394 0.217 0.18 0.28 1 ○ No.12-28UNF CPCTAUNCK 2.34 0.49 0.1770(84.0%) 0.1857(65.3%) 0.098 0.394 0.217 0.18 0.28 1 ○ Thread Mills 1/4-20UNC CPCTAU04N 2.42 0.65 0.1960(83.1%) 0.2067(66.7%) 0.150 0.504 0.236 0.18 0.28 1 ○ 1/4-28UNF CPCTAU04K 2.42 0.65 0.2110(84.0%) 0.2190(66.8%) 0.150 0.504 0.236 0.18 0.28 1 ○ 5/16-18UNC CPCTAU05O 3.54 0.76 0.2520(83.8%) 0.2630(68.6%) 0.185 0.579 0.315 0.24 0.35 2 ○ 5/16-24UNF CPCTAU05M 3.54 0.76 0.2670(84.0%) 0.2754(68.5%) 0.185 0.579 0.315 0.24 0.35 2 ○ Dies 3/8-16UNC CPCTAU06P 3.94 0.92 0.3070(83.7%) 0.3182(70.0%) 0.264 0.657 0.394 0.31 0.43 2 ○ 3/8-24UNF CPCTAU06M 3.94 0.92 0.3300(83.1%) 0.3372(69.8%) 0.264 0.657 0.394 0.31 0.43 2 ○ 7/16-14UNC CPCTAU07Q 4.33 1.08 0.3600(83.5%) 0.3717(70.9%) 0.303 0.776 0.472 0.35 0.47 2 ○ 7/16-20UNF CPCTAU07N 4.33 1.08 0.3830(83.9%) 0.3916(70.7%) 0.303 0.776 0.472 0.35 0.47 2 ○ Center Drills 1/2-13UNC CPCTAU08R 4.33 1.08 0.4170(83.1%) 0.4284(71.7%) 0.303 0.776 0.472 0.35 0.47 2 ○ 1/2-20UNF CPCTAU08N 4.33 1.08 0.4460(83.1%) 0.4537(71.3%) 0.303 0.776 0.472 0.35 0.47 2 ○ Centering Tools ANSI ST-4 299