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NPT
THREADING ER/L-NPT INSL PDY PDX IC INSL PDY RE

PDX
RE
External NPT
(National Pipe Threads)
Full Profile Laydown
Threading Inserts for Steam,
Gas and Water Pipes
NUT IC External right-hand shown
30° 30° Dimensions Tough 1 Hard

90°
1°47' SCREW
Designation IC TPI (3) RE INSL PDY PDX CICT (4) IC228 IC50M IC250 IC808 IC908 IC1007
16ER 27 NPT .375 27.0 .0016 .649 .03 .03 1 • •
16ER 18 NPT .375 18.0 .0024 .649 .03 .04 1 • • • •
16ERB 18 NPT (1) .375 18.0 .0024 .649 .04 .04 1 •
16ERM 18 NPT (1) .375 18.0 .0020 .649 .03 .04 1 • • •
16EL 14 NPT .375 14.0 .0027 .649 .04 .05 1 •
16ER 14 NPT .375 14.0 .0027 .649 .04 .05 1 • • • •
16ERB 14 NPT (1) .375 14.0 .0027 .649 .04 .05 1 •
16ERM 14 NPT (1) .375 14.0 .0020 .649 .04 .05 1 • • • • •
16EL 11.5 NPT .375 11.5 .0035 .649 .04 .06 1 •
16ER 11.5 NPT .375 11.5 .0035 .649 .04 .06 1 • • • •
16ERB 11.5 NPT (1) .375 11.5 .0035 .649 .04 .06 1 •
16ERM 11.5 NPT (1) .375 11.5 .0035 .649 .04 .06 1 • • • •
16ER 8 NPT .375 8.0 .0043 .649 .06 .06 1 • • •
16ERB 8 NPT (1) .375 8.0 .0043 .649 .06 .07 1 •
16ERM 8 NPT (1) .375 8.0 .0047 .649 .05 .07 1 • • • •
22ER 11.5 NPT 2M (2) .500 11.5 .0035 .866 .09 .14 2 •
27ER 11.5 NPT 3M (2) .625 11.5 .0035 1.083 .13 .22 3 •
27ER 8 NPT 2M (2) .625 8.0 .0035 1.083 .13 .20 2 •
• For Insert Identification System, see pages 694-695 • For threading between walls use GRIP-type insert TIP-NPT • National Pipe Threads ANSI/ASME B1201-1983
• For technical information and detailed cutting data, see pages 781-797
(1) With pressed chipformer
(2) Multi-tooth
(3) Threads per inch
(4) Number of teeth per corner
For tools, see pages: C#-SER/L (768) • SER/L (767) • SER/L-JHP (768)

730 ISCAR