Overall Pin Bored hole Bored hole dia. Bored hole Bored hole Bored hole Shank length length dia(. GO) (NOT-GO) depth(1.5D) depth( 2D) depth( 2.5D) dia. L ℓ d₁ d₂ ℓ₁ ℓ₂ ℓ₃ Ds CPC-S Check Pins for Bored Hole in thread cut tapping (Straight Type) Size Code L ℓ d1(inch) d2(inch) ℓ1 ℓ2 ℓ3 Ds Type Stock (for blind hole) Spiral Fluted Taps (inch) (inch) (Thread engagement ratio)(Thread engagement ratio) (inch) (inch) (inch) (inch) CPCSAUN6HA 0.1110(83.1%) 0.1148(71.4%) No.6-40UNF CPCSAUN6HB 0.1128(77.6%) 0.1167(65.6%) 1.93 0.35 0.207 0.276 0.345 0.157 1 ○ CPCSAUN6HC 0.1147(71.7%) 0.1186(59.7%) CPCSAUN6HD 0.1166(65.9%) 0.1205(53.9%) (for through hole) Spiral Fluted Taps CPCSAUN8JA 0.1300(83.8%) 0.1345(72.7%) No.8-32UNC CPCSAUN8JB 0.1324(77.8%) 0.1367(67.2%) 2.24 0.43 0.246 0.328 0.410 0.197 1 ○ CPCSAUN8JC 0.1346(72.4%) 0.1389(61.8%) CPCSAUN8JD 0.1367(67.2%) 0.1410(56.7%) (for through hole) Spiral Pointed Taps CPCSAUN8IA 0.1340(83.1%) 0.1377(72.9%) No.8-36UNF CPCSAUN8IB 0.1359(77.9%) 0.1397(67.3%) 2.24 0.43 0.246 0.328 0.410 0.197 1 ○ CPCSAUN8IC 0.1378(72.6%) 0.1416(62.1%) CPCSAUN8ID 0.1397(67.3%) 0.1435(56.8%) Hand Taps CPCSAUNAMA 0.1450(83.1%) 0.1502(73.5%) No.10-24UNC CPCSAUNAMB 0.1475(78.5%) 0.1528(68.7%) 2.56 0.55 0.285 0.380 0.475 0.217 1 ○ CPCSAUNAMC 0.1502(73.5%) 0.1555(63.7%) CPCSAUNAMD 0.1528(68.7%) 0.1581(58.9%) CPCSAUNAJA 0.1560(83.7%) 0.1601(73.7%) Carbide Taps Cemented No.10-32UNF CPCSAUNAJB 0.1581(78.6%) 0.1621(68.7%) 2.56 0.55 0.285 0.380 0.475 0.217 1 ○ CPCSAUNAJC 0.1601(73.7%) 0.1641(63.8%) CPCSAUNAJD 0.1621(68.7%) 0.1661(58.9%) CPCSAUNCMA 0.1710(83.1%) 0.1758(74.3%) Roll Taps No.12-24UNC CPCSAUNCMB 0.1733(78.9%) 0.1782(69.8%) 2.56 0.55 0.324 0.432 0.540 0.217 1 ○ CPCSAUNCMC 0.1758(74.3%) 0.1807(65.2%) CPCSAUNCMD 0.1782(69.8%) 0.1831(60.8%) CPCSAUNCKA 0.1770(84.0%) 0.1815(74.4%) Simple Inspection Tools Pipe Taps No.12-28UNF CPCSAUNCKB 0.1794(78.9%) 0.1836(69.8%) 2.56 0.55 0.324 0.432 0.540 0.217 1 ○ CPCSAUNCKC 0.1815(74.4%) 0.1857(65.3%) CPCSAUNCKD 0.1836(69.8%) 0.1878(60.8%) CPCSAU04NA 0.1960(83.1%) 0.2013(75.0%) 1/4-20UNC CPCSAU04NB 0.1986(79.2%) 0.2040(70.8%) 2.87 0.65 0.375 0.500 0.625 0.236 1 ○ CPCSAU04NC 0.2013(75.0%) 0.2067(66.7%) CPCSAU04ND 0.2040(70.8%) 0.2094(62.5%) CPCSAU04KA 0.2110(84.0%) 0.2152(75.0%) 1/4-28UNF CPCSAU04KB 0.2131(79.5%) 0.2171(70.8%) Thread Mills 2.87 0.65 0.375 0.500 0.625 0.236 1 ○ CPCSAU04KC 0.2150(75.4%) 0.2190(66.8%) CPCSAU04KD 0.2169(71.3%) 0.2209(62.7%) CPCSAU05OA 0.2520(83.8%) 0.2577(75.9%) 5/16-18UNC CPCSAU05OB 0.2551(79.5%) 0.2604(72.2%) Dies 3.90 0.87 0.469 0.625 0.781 0.315 1 ○ CPCSAU05OC 0.2577(75.9%) 0.2630(68.6%) CPCSAU05OD 0.2604(72.2%) 0.2657(64.8%) CPCSAU05MA 0.2670(84.0%) 0.2714(75.9%) 5/16-24UNF CPCSAU05MB 0.2694(79.6%) 0.2734(72.2%) 3.90 0.87 0.469 0.625 0.781 0.315 1 ○ Center Drills CPCSAU05MC 0.2714(75.9%) 0.2754(68.5%) CPCSAU05MD 0.2734(72.2%) 0.2774(64.8%) CPCSAU06PA 0.3070(83.7%) 0.3127(76.7%) 3/8-16UNC CPCSAU06PB 0.3101(79.9%) 0.3155(73.3%) 4.33 1.08 0.563 0.750 0.938 0.394 1 ○ CPCSAU06PC 0.3128(76.6%) 0.3182(70.0%) Centering Tools CPCSAU06PD 0.3155(73.3%) 0.3209(66.6%) 3/8-24UNF CPCSAU06MA 0.3300(83.1%) 0.3336(76.5%) 4.33 1.08 0.563 0.750 0.938 0.394 1 ○ CPCSAU06MB 0.3314(80.6%) 0.3354(73.2%) ANSI ST-2 297