Threading Tools Selection Guide ■ External Threading
Applications
Pipe Couplings for Gas, Water and Water Faucets
Pipe Threads for Steam, Gas and Water Supply Pipes
Aerospace Equipment
General Industrial Use
Internal Thread
Internal Thread
Internal Thread
Internal Thread
Internal Thread
Internal Thread
Internal Thread
Internal Thread
Internal Thread
F
1˚47'
1˚47'
1˚47'
60°
55°
60°
55°
55°
60°
60°
60°
60°
Pitch
Pitch
Pitch
Pitch
Pitch
Pitch
Pitch
Pitch
Pitch
External Thread
External Thread
External Thread
External Thread
External Thread
External Thread
External Thread
External Thread
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° Unified Thread
60° American NPT
60° American NPTF
60° UNJ
M
Symbol
W
M
G/Rp/W
NPT
R/Rc
NPTF
UNJ
UNC/UNF
UNC/UNF
mm Threads/Inch
Threads/Inch
mm
Threads/Inch
Threads/Inch
Threads/Inch
Threads/Inch
Threads/Inch
Threads/Inch
Pitch
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Wiper Edge
36, 32, 28 24, 20, 19 18, 16, 14 12, 11, 10 8
32, 28, 24 20, 18, 16 14, 13, 12 10, 8
0.50 to 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
48 to 8
SSTE Type
48 to 8
1.00 to 3.00
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
24 to 10
— —
— —
24 to 8
LTE Type
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
24 to 10
— —
— —
24 to 8
STE Type
0.20 to 1.50 48 to 16
— — — — — — —
STH Type
F59
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