
NPT (NATIONAL PIPE THREADS) EXTERNAL - FULL PROFILE (ANSI/ASME B1.20.1-1983), REGULAR AND M-TYPE Regular Type M-Type Application: Steam, Gas and Water Pipes *Right hand shown TT7010 TT9030 Thread Insert IC TPI L R X Y Grade Designation Hand Type Type (inch) (inch) (inch) (inch) (inch) 16EL8NPT External Left Regular 0.375 8 0.630 0.005 0.051 0.071 16EL11.5NPT External Left Regular 0.375 11.5 0.630 0.004 0.043 0.059 16EL14NPT External Left Regular 0.375 14 0.630 0.003 0.035 0.047 16EL18NPT External Left Regular 0.375 18 0.630 0.002 0.031 0.039 16EL27NPT External Left Regular 0.375 27 0.630 0.002 0.028 0.031 16ER8NPT External Right Regular 0.375 8 0.630 0.005 0.051 0.071 16ERM8NPT External Right M-Type 0.375 8 0.630 0.006 0.047 0.071 16ER11.5NPT External Right Regular 0.375 11.5 0.630 0.004 0.043 0.059 16ERM11.5NPT External Right M-Type 0.375 11.5 0.630 0.004 0.043 0.059 16ER14NPT External Right Regular 0.375 14 0.630 0.003 0.035 0.047 16ERM14NPT External Right M-Type 0.375 14 0.630 0.002 0.035 0.047 16ER18NPT External Right Regular 0.375 18 0.630 0.002 0.031 0.039 16ERM18NPT External Right M-Type 0.375 18 0.630 0.002 0.031 0.039 16ER27NPT External Right Regular 0.375 27 0.630 0.002 0.028 0.031 =P =M =K =N =S =H 1218