■ Unified Coarse Thread: UNC ■ Whitworth Fine Thread: W Nominal Internal Thread Nominal Internal Thread Thread TPI Toolholder Insert Bore Thread TPI Toolholder Insert Bore Partial Profile Full Profile Dia. Partial Profile Full Profile Dia. 2-56 UNC 56 1.69 W9.5 TPI 24 SINR0816S-08E 08IR5501 8.30 • No Tools • W10 TPI 24 24 — EZTR060050-55-008 — 8.80 • Available — — • W10.5 TPI 24 HPTR06005-55 9.30 • • W9.5 TPI 20 SINR0816S-08E 08IR5501 8.06 6-32 UNC 32 2.65 W10 TPI 20 8.56 8-32 UNC 32 — EZTR030025-60-002 — 3.31 W10.5 TPI 20 9.06 10-24 UNC 24 — EZTR035030-60-002 — 3.68 W11 TPI 20 EZTR060050-55-008 9.56 12-24 UNC 24 — EZTR040035-60-004 — 4.34 W11.5 TPI 20 20 — EZTR080070-55-008 — 10.06 — EZTR050040-60-004 — W12 TPI 20 HPTR06005-55 10.56 1/4-20 UNC 20 — HPTR04504-60/VNTR045-11 4.98 W12.5 TPI 20 HPTR08007-55 11.06 5/16-18 UNC 18 — EZTR060050-60-004 — 6.41 W13 TPI 20 11.56 — HPTR06005-60/VNTR060-11 W13.5 TPI 20 20 SINR1216S-11E 11IRA55 — 12.06 — EZTR070060-60-004 — 11IR55005 3/8-16 UNC 16 — HPTR07507-60-005 — 7.81 W11 TPI 18 9.40 7/16-14 UNC 14 9.15 W11.5 TPI 18 18 No Tools Available 9.90 W12 TPI 18 10.40 1/2-13 UNC 13 No Tools Available 10.58 W12.5 TPI 18 10.90 9/16-12 UNC 12 12.00 W14 TPI 18 12.40 5/8-11 UNC 11 13.38 W14.5 TPI 18 18 SINR1216S-11E 11IRA55 — 12.90 3/4-10 UNC 10 16IR10UN-TF 16.30 W15 TPI 18 11IR55005 13.40 7/8- 9 UNC 9 SINR1616S-16 16IRAG60 — 19.17 W16 TPI 18 14.40 1- 8 UNC 8 SINR2016S-16 16IRG60 16IR08UN-TF 21.96 W13 TPI 16 16 No Tools Available 11.20 1 1/8- 7 UNC 24.65 W13.5 TPI 16 11.70 7 SINR2420S-22 W14 TPI 16 12.20 1 1/4- 7 UNC 27.82 W14.5 TPI 16 16 SINR1216S-11E 11IRA55 — 12.70 1 3/8- 6 UNC 6 CINR3025S-22 22IRN60 — 30.34 W15 TPI 16 11IR55005 13.20 1 1/2- 6 UNC 33.52 W17 TPI 16 16 SINR1516S-11 15.20 1 3/4- 5 UNC 5 CINR3732S-22 38.95 W18 TPI 16 16IRAG55 16.20 2-4 1/2 UNC 41/2 44.69 W19 TPI 16 16 SINR1616S-16 16IRG55 (16IR16W-TF) 17.20 • * 2-4 1/2 UNC and over cannot be machined, • W20 TPI 16 16IR5501 18.20 • because no inserts are available for the TPI. • 16IR5502 • • W16 TPI 14 14 SINR1216S-11E 13.94 W17 TPI 14 11IRA55 — 14.94 ■ Unified Fine Thread: UNF W18 TPI 14 14 SINR1516S-11 11IR55005 15.94 Internal Thread W21 TPI 14 14 SINR1616S-16 18.94 J Nominal TPI W22 TPI 14 16IRAG55 19.94 Thread (TPI) Toolholder Insert Bore W23 TPI 14 16IRG55 (16IR14W-TF) 20.94 Partial Profile Full Profile Dia. W24 TPI 14 14 SINR2016S-16 16IR5501 (16IR14W) 21.94 0-80 UNF 80 1.18 W25 TPI 14 16IR5502 22.94 • No Tools • W26 TPI 14 23.94 • Available — — • W19 TPI 12 16.60 • • W20 TPI 12 12 SINR1616S-16 — 17.60 6-40 UNF 40 2.82 W21 TPI 12 18.60 Threading 8-36 UNF 36 — EZTR030025-60-002 — 3.40 W22 TPI 12 19.60 10-32 UNF 32 — EZTR035030-60-002 — 3.97 W28 TPI 12 25.60 12-28 UNF 28 — EZTR040035-60-004 — 4.50 W30 TPI 12 12 SINR2420S-16 — 27.60 1/4-28 UNF 28 — EZTR050040-60-004 — 5.37 W32 TPI 12 16IRAG55 29.60 — HPTR04504-60/VNTR045-11 W34 TPI 12 16IRG55 31.60 — EZTR060050-60-004 — W35 TPI 12 12 CINR3025S-16 16IR5501 — 32.60 5/16-24 UNF 24 — HPTR06005-60/VNTR060-11 6.79 W36 TPI 12 16IR5502 33.60 SINR0612S-06E 06IR60005 — W38 TPI 12 35.60 W40 TPI 12 37.60 — EZTR070060-60-004 — W42 TPI 12 39.60 3/8-24 UNF 24 — HPTR07507-60-005 — 8.38 W44 TPI 12 CINR3732S-16 — 41.60 SINR0612S-06E 06IR60005 — W45 TPI 12 42.60 7/16-20 UNF 9.74 W46 TPI 12 12 43.60 1/2-20 UNF 20 SINR0816S-08E 08IR60007 — 11.33 W48 TPI 12 45.60 W50 TPI 12 * Hereafter, 12 TPI Whitworth Fine Thread can 47.60 9/16-18 UNF 18 SINR1216S-11E 11IRA60 — 12.76 • be machined by the same tool as above. • 5/8-18 UNF 11IR60005 14.35 • • SINR1516S-11 11IRA60 — • • 3/4-16 UNF 16 11IR60005 17.33 W23 TPI 10 20.12 SINR1616S-16 16IR16UN(-TF) W24 TPI 10 10 SINR2016S-16 — 21.12 7/8-14 UNF 14 SINR2016S-16 16IR14UN(-TF) 20.26 W25 TPI 10 22.12 1-12 UNF 12 SINR2016S-16 16IRAG60 23.10 W26 TPI 10 23.12 1 1/8-12 UNF 16IRG60 26.28 W28 TPI 9 24.80 1 1/4-12 UNF 12 SINR2420S-16 16IR6001 16IR12UN(-TF) 29.46 W30 TPI 9 9 SINR2420S-16 16IRAG55 — 26.80 W32 TPI 9 16IRG55 28.80 1 3/8-12 UNF 12 CINR3025S-16 32.63 W34 TPI 8 30.40 1 1/2-12 UNF 36.81 W35 TPI 8 31.40 ■ Whitworth Coarse Thread: W W36 TPI 8 8 CINR3025S-16 — 32.40 W38 TPI 8 34.40 W40 TPI 8 36.40 Nominal Internal Thread W42 TPI 8 38.40 TPI Toolholder Insert Bore W44 TPI 7 39.89 Thread Partial Profile Full Profile Dia. W45 TPI 7 40.89 W 1/4 20 No Tools 4.91 W46 TPI 7 7 CINR3732S-22 22IRN55 — 41.89 W 5/16 18 Available — — 6.34 W48 TPI 7 43.89 W 3/8 16 7.73 W50 TPI 7 45.89 W52 TPI 7 47.89 W 7/16 14 9.06 W55 TPI 6 50.20 W 1/2 12 No Tools Available 10.30 W58 TPI 6 53.20 W 9/16 11.89 W60 TPI 6 6 CINR3732S-22 22IRN55 — 55.20 W 5/8 11 13.26 W62 TPI 6 57.20 W 3/4 10 SINR1616S-16 — 16.17 • • W 7/8 9 16IRAG55 19.03 W72 TPI 6 67.20 W 1 8 SINR2016S-16 16IRG55 — 21.80 W75 TPI 5 69.24 W 1 1/8 24.47 • 5 CINR3732S-22 22IRN55 — • W 1 1/4 7 SINR2420S-22 22IRN55 — 27.64 • • W 1 3/8 30.13 W105 TPI 5 99.24 W 1 1/2 6 CINR3025S-22 22IRN55 — 33.30 W110 TPI 4 102.8 W 1 5/8 5 35.52 • 4 No Tools Available • • • W 1 3/4 5 CINR3732S-22 22IRN55 — 38.69 W 1 7/8 41/2 41.23 W 2 No Tools Available 44.41 W 2 1/4 4 49.96 ● Above shows the usage example of applicable Toolholder / Insert. J45