Threading Applicable toolholders and inserts TPGB for internal threading Unified coarse thread: UNC Whitworth fine thread: W Internal thread Internal thread Nominal thread TPI Toolholder Insert Bore dia. Nominal thread TPI Toolholder Insert Bore dia. Partial profile Full profile Partial profile Full profile 2-56 UNC 56 1.69 W9.5 TPI 24 SINR0816S-08E 08IR5501 8.30 ∙∙ No tools available -∙6-32 UNC32 ∙-∙∙2.65 W10 TPI 24 24W10.5 TPI 24- EZTR060050-55-008 - 8.809.30W9.5 TPI 20SINR0816S-08E08IR55018.06 8-32 UNC 32 - EZTR030025-60-002 - 3.3110-24 UNC24-EZTR035030-60-002-3.6812-24 UNC24-EZTR040035-60-004-4.341/4-20 UNC20--EZTR050040-60-004VNTR045-11--4.98W10TPI 208.56W10.5 TPI 209.06W11TPI 20W11.5 TPI 2020W12TPI 20-EZTR060050-55-008EZTR080070-55-008-9.5610.0610.56W12.5 TPI 2011.06 5/16-18 UNC 18 -- EZTR060050-60-004VNTR060-11 -- 6.413/8-16 UNC16-EZTR070060-60-004-7.81W13TPI 20W13.5 TPI 2020SINR1216S-11E11IRA5511IR55005W11TPI 18 11.56-12.069.40 7/16-14 UNC 141/2-13 UNC139/16-12 UNC12 No tools available 9.1510.58 W11.5 TPI 18W12TPI 181812.00W12.5 TPI 18 No tools available 9.9010.4010.90 5/8-11 UNC 11 13.38 W14 TPI 18 12.40 3/4-10 UNC7/8- 9 UNC109 SINR1616S-16 16IRAG6016IRG60 16IR10UN-- 16.3019.17 W14.5 TPI 18W15TPI 1818 SINR1216S-11E 11IRA5511IR55005W16TPI 18 - 12.9013.4014.40 1- 8 UNC 8 SINR2016S-161 1/8- 7 UNC1 1/4- 7 UNC7SINR2420S-2216IR08UN- 21.9624.65 W13 TPI 16W13.5 TPI 1616 No tools available 11.2011.7027.82W14TPI 1612.20 1 3/8- 6 UNC1 1/2- 6 UNC6 CINR3025S-22 22IRN60 - 30.34 W14.5 TPI 16 16 SINR1216S-11E 11IRA5533.52W15TPI 1611IR55005- 12.7013.20 1 3/4- 5 UNC 5 CINR3732S-22 38.952-4 1/2 UNC4 1/244.69∙* 2-4 1/2 UNC and over cannot be machined, because no inserts are avail-∙∙able for the TPI.∙∙∙W17TPI 1616SINR1516S-1115.20W18TPI 16W19TPI 1616SINR1616S-16W20TPI 1616IRAG5516IRG5516IR550116IR550216.20(16IR16W-)17.2018.20 Unified fine thread: UNF W16 TPI 14 14 SINR1216S-11EW17TPI 14W18TPI 1414SINR1516S-1111IRA5511IR55005 13.94-14.9415.94Internal threadNominal threadTPIToolholderInsertBore dia.Partial profileFull profileW21TPI 14W22TPI 1414SINR1616S-1616IRAG5518.9419.94W23TPI 1416IRG55(16IR14W)20.94J 0-80 UNF 80∙ 1.18∙ W24 TPI 14W25TPI 1414 SINR2016S-16 16IR550116IR5502 (16IR14W) 21.9422.94 ∙ No tools available - - ∙ W26 TPI 14 23.94 ∙ ∙6-40 UNF402.828-36 UNF36-EZTR030025-60-002-3.40W19TPI 12W20TPI 12W21TPI 1212SINR1616S-16 16.60-17.6018.60 10-32 UNF 32 - EZTR035030-60-002 - 3.97 W22 TPI 12 19.60 12-28 UNF 28 - EZTR040035-60-004 - 4.50 W28 TPI 12 25.60 1/4-28 UNF 28 -- EZTR050040-60-004VNTR045-11 -- 5.37 W30 TPI 12 12 SINR2420S-16W32TPI 12 16IRAG55 - 27.6029.60 - EZTR060050-60-004 - W34 TPI 12 16IRG55 31.60 5/16-24 UNF 24 - VNTR060-11 - 6.79 W35 TPI 12W36TPI 1212 CINR3025S-16 16IR550116IR5502 - 32.6033.60 SINR0612S-06E 06IR60005 - W38 TPI 12 35.60 3/8-24 UNF 24 -SINR0612S-06E EZTR070060-60-00406IR60005 -- 8.38 W40 TPI 12W42TPI 12 37.6039.60 7/16-20 UNF1/2-20 UNF20 SINR0816S-08E 08IR60007 - 9.7411.33 W44 TPI 12W45TPI 12 CINR3732S-16 - 41.6042.60 9/16-18 UNF5/8-18 UNF18 SINR1216S-11E 11IRA6011IR600053/4-16 UNF16SINR1516S-1111IRA6011IR60005-12.7614.35-17.33W46TPI 12W48TPI 1212 43.6045.60W50TPI 12∙∙* Hereafter, 12 TPI whitworth fine thread can be machined by the sametool as above.47.60∙∙ SINR1616S-16 16IR16UN(- ) ∙ ∙ 7/8-14 UNF 14 SINR2016S-16 16IR14UN(- ) 20.26 W23 TPI 10 20.12 1-12 UNF 12 SINR2016S-16 16IRAG60 23.101 1/8-12 UNF1 1/4-12 UNF12SINR2420S-1616IRG6026.2816IR600116IR12UN(-)29.46W24TPI 10W25TPI 1010SINR2016S-16W26TPI 10-21.1222.1223.12 1 3/8-12 UNF1 1/2-12 UNF12 CINR3025S-16Whitworth coarse thread: W 32.6336.81 W28 TPI 9W30TPI 99 SINR2420S-16W32TPI 9W34TPI 816IRAG5516IRG55 24.80-26.8028.8030.40W35TPI 831.40 Internal thread W36 TPI 8W38TPI 88 CINR3025S-16 - 32.4034.40 Nominal thread TPI Toolholder Insert Bore dia.Partial profileFull profileW40TPI 8W42TPI 8 36.4038.40 W 1/4W 5/16 2018 No tools available - - 4.916.34 W44 TPI 7W45TPI 7 39.8940.89 W 3/8 16W 7/1614W 1/2W 9/1612 No tools available 7.739.06 W46 TPI 7W48TPI 77 CINR3732S-22 22IRN55W50TPI 7 - 41.8943.8945.8910.30W52TPI 747.8911.89W55TPI 650.20 W 5/8 11 13.26 W58 TPI 6 53.20 W 3/4W 7/8W1 109 SINR1616S-168SINR2016S-1616IRAG5516IRG55 - 16.1719.03 W60 TPI 6W62TPI 66 CINR3732S-22 22IRN55-21.80∙ - 55.2057.20∙ W 1 1/8W 1 1/4 7 SINR2420S-22 22IRN55 - 24.4727.64 W72 TPI 6W75TPI 5 67.2069.24 W 1 3/8W 1 1/2 6 CINR3025S-22 22IRN55 30.13-33.30 ∙∙ 5 CINR3732S-22 22IRN55 - ∙∙ W 1 5/8 5 35.52 W105 TPI 5 99.24 W 1 3/4 5 CINR3732S-22 22IRN55 - 38.69 W110 TPI 4 102.8 W 1 7/8W2 4 1/2 No tools available 41.2344.41 ∙ 4∙ No tools available ∙∙ W 2 1/4 4 49.96 Above shows the usage example of applicable Toolholder / Insert. J51