Section F 25-26

Internal Thread

Pitch 60° Threading Tools Selection Guide ■ External Threading External Thread 55° Pitch

1˚47'

60°

55°

60°

55° Pitch

Pitch 60°

Pitch

External Thread

60° General-purpose Thread

55° General-purpose Thread (Whitworth)

55° Parallel Thread for Pipe/Whitworth

55° Taper Thread for Pipe BSPT

Type

60° ISO Metric Thread

60° Unied Thread

60° American NPT

60° UNJ

60° American NPTF

M UNC/UNF

Symbol

G/Rp/W

NPT

R/Rc

NPTF

UNJ

UNC/UNF

mm Threads/Inch

Applications

Threads/Inch Pipe Couplings for Gas, Water and Water Faucets Threads/Inch

Threads/Inch Pipe Threads for Steam, Gas and Water Supply Pipes Threads/Inch

Threads/Inch Aerospace Equipment Yes

Threads/Inch

Pitch

General Industrial Use

Yes

Wiper Edge

36, 32, 28 24, 20, 19 18, 16, 14 12, 11, 10 8 55° Parallel Thread for Pipe/Whitworth 55° Pitch Internal Thread External Thread

Internal Thread

0.50 to 3.00 Internal Thread

Internal Thread

32, 28, 24 20, 18, 16 14, 13, 12 10, 8 Pitch 60° Internal Thread External Thread 60° Unied Thread 24, 20, 18 16, 14, 12 8 Threads/Inch UNC/UNF

Internal Thread

1˚47'

0.75, 1.00, 1.25 1.50, 1.75, 2.00 2.50, 3.00 Pitch 60° External Thread 60° ISO Metric Thread 1.00, 1.25, 1.50 1.75, 2.00, 2.50 3.00, 3.50, 4.00 mm M

32, 28, 24 20, 18, 16 14, 12, 10 Pitch 60° External Thread

60°

55°

60°

28, 19 14, 11 Pitch External Thread

27, 18, 14 11.5 Pitch External Thread

27, 18, 14 11.5, 8 Pitch External Thread

55° Pitch

Pitch 60°

48 to 8 External Thread

48 to 8 External Thread 60° General-purpose Thread 1.00 to 3.00 M UNC/UNF 24 to 8 mm Threads/Inch

55° General-purpose Thread (Whitworth)

SSTE Type

55° Taper Thread for Pipe BSPT

60° American NPT

60° UNJ

60° American NPTF

Symbol

G/Rp/W

NPT

R/Rc

NPTF

UNJ

28, 19 14, 11 Threads/Inch

24 to 10 Threads/Inch

— —

Threads/Inch

Pitch

LTE Wiper Edge

Yes

36, 32, 28 24, 20, 19 18, 16, 14 12, 11, 10 8

24, 20, 18 16, 14, 12 8 32, 28, 24 20, 18, 16 14, 13, 12 10, 8

1.00 to 3.00 0.50 to 3.00

1.00, 1.25, 1.50 1.75, 2.00, 2.50 3.00 0.75, 1.00, 1.25 1.50, 1.75, 2.00 2.50, 3.00

32, 28, 24 20, 18, 16 14, 12, 10

28, 19 14, 11

27, 18, 14 11.5

27, 18, 14 11.5, 8

24 to 10 48 to 8

— —

24 to 8 48 to 8

STE SSTE

1.00 to 3.00

0.80, 1.00, 1.25 1.50, 1.75, 2.00 2.50 1.00, 1.25, 1.50 1.75, 2.00, 2.50 3.00, 3.50, 4.00

— 24, 20, 18 16, 14, 12 8

28, 19 14, 11

0.80 to 3.00 24 to 10 24

28, 19

— — — — — —

— —

24 to 8

THE LTE

1.00 to 3.00

1.00, 1.25, 1.50 1.75, 2.00, 2.50 3.00

24, 20, 18 16, 14, 12 8

28, 19 14, 11

3.00 to 6.00 11 to 4.5 24 to 10

— — — — — — — — — — —

24 to 8

GME-TH STE

0.80, 1.00, 1.25 1.50, 1.75, 2.00 2.50

0.20 to 1.50 48 to 16 0.80 to 3.00 24 to 10

— — — — — — — — — — — — 28, 19

STH THE

3.00 to 6.00 11 to 4.5

— — — — — — —

GME-TH

0.20 to 1.50 48 to 16

— — — — — — —

STH

F69

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