UN / UNF NPT/NPTF S PART NO. mm Inch N N2 mm mm mm mm 6 1/4 7/16 -20 1/8 -27 11 22.6 19.8 4.4 4-2F-MEN 6 1/4 7/16 -20 1/4 -18 14 26.6 27.7 4.4 4F-MEN 6 1/4 7/16 -20 3/8 -18 19 28.5 27.5 4.4 4-6F-MEN 6 1/4 7/16 -20 1/2 -14 22 31 36.5 4.4 4-8F-MEN 8 5/16 1/2 -20 1/8 -27 13 24.1 19.8 6 5-2F-MEN 8 5/16 1/2 -20 1/4 -18 14 26.6 27.7 6 5-4F-MEN 10 3/8 9/16 -18 1/8 -27 14 26.9 27.7 7.5 6-2F-MEN 10 3/8 9/16 -18 1/4 -18 14 26.9 23.9 7.5 6-4F-MEN 10 3/8 9/16 -18 3/8 -18 19 29 31 7.5 6F-MEN 10 3/8 9/16 -18 1/2 -14 22 31 37.3 7.5 6-8F-MEN 12 1/2 3/4 -16 1/4 -18 19 31.8 31 9.9 8-4F-MEN 12 1/2 3/4 -16 3/8 -18 19 31.8 31 9.9 8-6F-MEN 12 1/2 3/4 -16 1/2 -14 22 33.8 37.3 9.9 8F-MEN 12 1/2 3/4 -16 3/4 -14 27 36.1 40.4 9.9 8-12F-MEN 14/15/16 5/8 7/8 -14 3/8 -18 22 36.8 32.5 12.3 10-6F-MEN 14/15/16 5/8 7/8 -14 1/2 -14 22 36.8 37.3 12.3 10-8F-MEN 14/15/16 5/8 7/8 -14 3/4 -14 27 36.2 40.5 12.3 10-12F-MEN 18/20 3/4 1 1/16 -12 1/2 -14 27 42.2 40.4 15.5 12-8F-MEN 18/20 3/4 1 1/16 -12 3/4 -14 27 42.2 40.4 15.5 12F-MEN 18/20 3/4 1 1/16 -12 1 -11.5 33 44.7 50 15.5 12-16F-MEN 25 1 1 5/16 -12 3/4 -14 33 46 45.2 21.5 16-12F-MEN 25 1 1 5/16 -12 1 -11.5 33 46 50 21.5 16F-MEN 25 1 1 5/16 -12 1 1/4 -11.5 41 54 60.5 21.5 16-20F-MEN 28/30/32 1 1/4 1 5/8 -12 1 -11.5 41 52.3 59.7 27.5 20-16F-MEN 28/30/32 1 1/4 1 5/8 -12 1 1/4 -11.5 41 52.3 60.5 27.5 20F-MEN 28/30/32 1 1/4 1 5/8 -12 1 1/2 -11.5 46 56 67 27.5 20-24F-MEN 35/38 1 1/2 1 7/8 -12 1 1/4 -11.5 48 59 57 33 24-20F-MEN 35/38 1 1/2 1 7/8 -12 1 1/2 -11.5 48 59 67 33 24F-MEN UN / UNF NPT/NPTF S PART NO. mm Inch N N2 mm mm mm mm 6 1/4 7/16 -20 1/8 -28 11 22.6 19.8 4.4 4-2F-MER 6 1/4 7/16 -20 1/4 -19 14 26.6 27.7 4.4 4F-MER 8 5/16 1/2 -20 1/8 -28 13 24.1 19.8 6 5-2F-MER 8 5/16 1/2 -20 1/4 -19 14 26.6 27.7 6 5-4F-MER 10 3/8 9/16 -18 1/4 -19 14 26.9 27.7 7.5 6-4F-MER 10 3/8 9/16 -18 3/8 -19 19 29 31 7.5 6F-MER 10 3/8 9/16 -18 1/2 -14 22 31 37.3 7.5 6-8F-MER 12 1/2 3/4 -16 1/4 -19 19 31.8 31 9.9 8-4F-MER 12 1/2 3/4 -16 3/8 -19 19 31.8 31 9.9 8-6F-MER 12 1/2 3/4 -16 1/2 -14 22 33.8 37.3 9.9 8F-MER 14/15/16 5/8 7/8 -14 3/8 -19 22 36.5 32.5 12.3 10-6F-MER 14/15/16 5/8 7/8 -14 1/2 -14 22 36.8 37.3 12.3 10-8F-MER 14/15/16 5/8 7/8 -14 3/4 -14 27 39.2 40.4 12.3 10-12F-MER 18/20 3/4 1 1/16 -12 1/2 -14 27 42.2 40.4 15.5 12-8F-MER 18/20 3/4 1 1/16 -12 3/4 -14 27 42.2 40.4 15.5 12F-MER 18/20 3/4 1 1/16 -12 1 -11 33 44.7 50 15.5 12-16F-MER 25 1 1 5/16 -12 3/4 -14 33 46 45.2 21.5 16-12F-MER 25 1 1 5/16 -12 1 -11 33 46 50 21.5 16F-MER 28/30/32 1 1/4 1 5/8 -12 1 -11 41 52.3 59.7 27.5 20-16F-MER 28/30/32 1 1/4 1 5/8 -12 1 1/4 -11 41 52.3 60.5 27.5 20F-MER 35/38 1 1/2 1 7/8 -12 1 1/2 -11 48 59.2 67.1 33 24F-MER THREAD UN / UNF BSPT S D PART NO. mm Inch N N2 mm mm mm mm mm 6 1/4 7/16 -20 1/8 -28 11 22.6 26.2 14 4.4 4-2F-MEG 6 1/4 7/16 -20 1/4 -19 14 26.6 31.8 19 4.4 4F-MEG 8 5/16 1/2 -20 1/8 -28 13 24.1 27.7 14 6 5-2F-MEG 8 5/16 1/2 -20 1/4 -19 14 26.6 31.8 19 6 5-4F-MEG 8 5/16 1/2 -20 3/8 -19 19 28.5 36.8 22 6 5-6F-MEG 10 3/8 9/16 -18 1/4 -19 14 26.9 31.8 19 7.5 6-4F-MEG 10 3/8 9/16 -18 3/8 -19 19 29 36.8 22 7.5 6F-MEG 10 3/8 9/16 -18 1/2 -14 22 31 43.2 27 7.5 6-8F-MEG 12 1/2 3/4 -16 1/4 -19 19 31.8 36.8 19 9.9 8-4F-MEG 12 1/2 3/4 -16 3/8 -19 19 31.8 36.8 22 9.9 8-6F-MEG 12 1/2 3/4 -16 1/2 -14 22 33.8 43.2 27 9.9 8F-MEG 14/15/16 5/8 7/8 -14 3/8 -19 22 36.8 37.1 22 12.3 10-6F-MEG 14/15/16 5/8 7/8 -14 1/2 -14 27 36.8 43.2 27 12.3 10-8F-MEG 14/15/16 5/8 7/8 -14 3/4 -14 36 39.2 49.3 36 12.3 10-12F-MEG 18/20 3/4 1 1/16 -12 1/2 -14 27 42.2 49.3 27 15.5 12-8F-MEG 18/20 3/4 1 1/16 -12 3/4 -14 36 42.2 49.3 36 15.5 12F-MEG 18/20 3/4 1 1/16 -12 1 -11 41 44.7 52.1 41 15.5 12-16F-MEG 25 1 1 5/16 -12 3/4 -14 36 46 48.2 36 21.5 16-12F-MEG 25 1 1 5/16 -12 1 -11 41 46 52.1 41 21.5 16F-MEG 28/30/32 1 1/4 1 5/8 -12 1 -11 41 52.3 57.2 41 27.5 20-16F-MEG 28/30/32 1 1/4 1 5/8 -12 1 1/4 -11 50 52.3 57.2 50 27.5 20F-MEG 35/38 1 1/2 1 7/8 -12 1 1/4 -11 50 59.2 60.7 50 33 24-20F-MEG 35/38 1 1/2 1 7/8 -12 1 1/2 -11 55 59.2 60.7 55 33 24F-MEG THREAD UN / UNF UN / UNF S D PART NO. mm Inch N N1 mm mm mm mm mm 6 1/4 7/16 -20 7/16 -20 11 31.2 22 14 4.4 4-7F-MCU 6 1/4 7/16 -20 9/16 -18 14 31.2 22 17 4.4 4-9F-MCU 8 5/16 1/2 -20 1/2 -20 13 31.2 22 17 6 5-8F-MCU 8 5/16 1/2 -20 9/16 -18 14 33 23 17 6 5-9F-MCU 10 3/8 9/16 -18 7/16 -20 14 26.9 30.3 14 7.5 5-7F-MCU 10 3/8 9/16 -18 1/2 -20 14 26.9 30.3 17 7.5 6-8F-MCU 10 3/8 9/16 -18 9/16 -18 14 26.9 31.8 17 7.5 6-9F-MCU 10 3/8 9/16 -18 3/4 -16 19 29 36.8 22 7.5 6-12F-MCU 10 3/8 9/16 -18 7/8 -14 22 31 43.2 27 7.5 6-14F-MCU 12 1/2 3/4 -16 9/16 18 19 31.8 33.5 17 9.9 8-9F-MCU 12 1/2 3/4 -16 3/4 -16 19 31.8 36.8 22 9.9 8-12F-MCU 12 1/2 3/4-16 7/8 -14 22 33.8 43.2 27 9.9 8-14F-MCU 12 1/2 3/4-16 1 1/16 -12 27 36.1 49.3 32 9.9 8-17F-MCU 14/15/16 5/8 7/8-14 3/4 -16 22 36.8 39.1 22 12.3 10-12F-MCU 14/15/16 5/8 7/8-14 7/8 -14 22 26.8 43.2 27 12.3 10-14F-MCU 14/15/16 5/8 7/8-14 1 1/16 -12 27 39.2 49.3 32 12.3 10-17F-MCU 18/20 3/4 1 1/16 -12 3/4 -16 27 42.2 41.2 22 15.5 12F-MCU 18/20 3/4 1 1/16 -12 7/8 -14 27 42.2 45.2 27 15.5 12-14F-MCU 18/20 3/4 1 1/16 -12 1 1/16 -12 27 42.2 49.3 32 15.5 12-17F-MCU 18/20 3/4 1 1/16 -12 1 5/16 -12 33 44.7 52.1 41 15.5 12-21F-MCU 25 1 1 5/16 -12 1 1/16 -12 33 46 52.1 32 21.5 16-17F-MCU 25 1 1 5/16 -12 1 5/16 -12 33 46 52.1 41 21.5 16-21F-MCU 25 1 1 5/16 -12 1 5/8 -12 41 52.3 57.2 41 21.5 16-26F-MCU 28/30/32 1 1/4 1 1/4 1 5/8 -12 1 5/8 -12 41 52.3 57.2 50 27.5 20-26F-MCU 35/38 1 1/2 1 7/8 -12 1 7/8 -12 48 59.2 60.7 55 33 24-30F-MCU