Super Fast Mill-Thread Insert .A\V/ ISO Metric National Pipe Thread (NPT) Dimensions(mm) Teeth Dimensions(mm) Teeth Designation(External) Designation(Internal) Pitch(mm) Picture Designation(External+Internal) Pitch(TPI) Picture L Le Zt L Le Zt H25E l.OOISO SM H25N l.OOISO SM 1.0 25 24.00 24 H25EI 14 NPT SM 14 25 23.58 13 30 ° 30° 1.25ISO SM 1.25ISO SM 1.25 25 23.75 19 Le 1/4P Internal 11.5NPT SM 11.5 25 24.30 11 1.50ISO SM 1.50ISO SM 1.5 25 24.00 16 lA/wwwlB fMn 8 NPT SM 8 25 22.22 7 2.00ISO SM 2.00ISO SM 2.0 25 24.00 12 2.50ISO SM 2.50ISO SM 2.5 25 25.00 10 External External 3.00ISO SM 3.00ISO SM 3.0 25 24.00 8 American UN (UN, UN, UNF, UNEF, UNS) British Standard Pipe Thread (BSPT) Dimensions(mm) Teeth Dimensions(mm) Teeth Designation(External) Designation(Internal) Pitch(TPI) Picture Designation(External+Internal) Pitch(TPI) Picture L Le Zt L Le Zt H25E 20UN SM H25N 20UNSM 20 25 24.13 1918UN SM18UN SM182523.9917 H25EI 14BSPTSM11BSPT SM 14 25 24.06 13112523.0910 Le R\0.2173.57P°27.5Jnternal 16UN SM 16UN SM 16 25 23.81 15 Le — 1° 47' 14UN SM 14UN SM 14 25 23.58 13 O12UN SM12UN SM122523.2811 .>A 47fR0i37PExternal 10UN SM 10UN SM 10 25 22.86 9 1/8P External 9 UN SM 9 UN SM 9 25 22.58 8 8 UN SM 8 UN SM 8 25 22.22 7 Whitworth (BSW, BSF, BSP, BSB) Dimensions(mm) Teeth Designation(External +Internal) Pitch(TPI) Picture L Le Zt H25EI 16WSM 16 25 23.81 15 14W SM 14 25 23.58 13 * Le — -/vyvy\ AwyvyvA /v/vnR 0.137P 12W SM 12 25 23.28 11 o © 11W SM 11 25 23.09 10 R 0.137P External 349 350