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NPT

ER/L-NPT PDX PDX
External NPT RE IC RE
(National Pipe Threads) PDY PDY
Full Profile Laydown INSL INSL
Threading Inserts for Steam, IC THREADING
Gas and Water Pipes
External right-hand shown
NUT Dimensions
30° 30° 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 9.52 27.0 0.04 16.49 0.7 0.8 1 • •
16ER 18 NPT 9.52 18.0 0.06 16.49 0.8 1.0 1 • • • •
16ERB 18 NPT (1) 9.52 18.0 0.06 16.49 0.9 1.1 1 •
16ERM 18 NPT (1) 9.52 18.0 0.05 16.49 0.8 1.0 1 • • •
16EL 14 NPT 9.52 14.0 0.07 16.49 0.9 1.2 1 •
16ER 14 NPT 9.52 14.0 0.07 16.49 0.9 1.2 1 • • • •
16ERB 14 NPT (1) 9.52 14.0 0.07 16.49 0.9 1.2 1 •
16ERM 14 NPT (1) 9.52 14.0 0.05 16.49 0.9 1.2 1 • • • • •
16EL 11.5 NPT 9.52 11.5 0.09 16.49 1.1 1.5 1 •
16ER 11.5 NPT 9.52 11.5 0.09 16.49 1.1 1.5 1 • • • •
16ERB 11.5 NPT (1) 9.52 11.5 0.09 16.49 1.1 1.5 1 •
16ERM 11.5 NPT (1) 9.52 11.5 0.09 16.49 1.1 1.5 1 • • • •
16ER 8 NPT 9.52 8.0 0.11 16.49 1.4 1.6 1 • • •
16ERB 8 NPT (1) 9.52 8.0 0.11 16.49 1.4 1.7 1 •
16ERM 8 NPT (1) 9.52 8.0 0.12 16.49 1.3 1.8 1 • • • •
22ER 11.5 NPT 2M (2) 12.70 11.5 0.09 22.00 2.3 3.5 2 •
27ER 11.5 NPT 3M (2) 15.88 11.5 0.09 27.50 3.3 5.5 3 •
27ER 8 NPT 2M (2) 15.88 8.0 0.09 27.50 3.3 5.0 2 •
• For Insert Identification System, see pages 638-639 • For threading between walls use GRIP-type insert TIP-NPT. • National Pipe Threads ANSI/ASME B1.20.1-1983
• For technical information and detailed cutting data, see pages 711-727
(1) With pressed chipformer
(2) Multi-tooth
(3) Threads per inch
(4) Number of teeth per corner
For tools, see pages: C#-SER/L (701) • SER-D (702) • SER/L (700)

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