Internal
mm
Diameter
inch
Threads
per inch
6.35 1/4 26
7.94 5/16 22
9.52 3/8 20
11.11 7/16 18
12.70 1/2 16
14.29 9/16 16
15.88 5/8 14
17.46 11/16 14
19.05 3/4 12
 
Internal
mm
Diameter
inch
Threads
per inch
6.35 1/4 26
7.94 5/16 26
9.52 3/8 26
11.11 7/16 26
12.70 1/2 26
14.29 9/16 26
15.88 5/8 26
19.05 3/4 26
 
Internal
mm
Diameter
inch
Threads
per inch
9.73 1/8 28
13.16 1/4 19
16.66 3/8 19
20.96 1/2 14
 
Internal
mm
Diameter
inch
Threads
per inch
9.73 1/8 28
13.16 1/4 19
16.66 3/8 19
 
Internal
mm
Diameter
inch
Threads
per inch
10.27 1/8 27
13.57 1/4 18
17.06 3/8 18
 
Internal
mm
Diameter
inch
Threads
per inch
10.27 1/8 27
13.57 1/4 18
17.06 3/8 18
Internal
mm
Diameter
inch
Threads
per inch
12.70 1/2 18
15.88 5/8 18
19.05 3/4 16
Internal
mm
Diameter
inch
Threads
per inch
6.35 1/4 24
6.35 1/4 32
7.94 5/16 32
9.52 3/8 20
9.52 3/8 32
11.11 7/16 24
12.70 1/2 24
14.29 9/16 20
14.29 9/16 24
15.88 5/8 24
17.46 11/16 11
17.46 11/16 16
1 1/2 " EXTERNAL DIAMETER
 
THREAD TYPES
Sizes Table
Internal
mm
Diameter
inch
Threads
per inch
6.35 1/4 20
7.94 5/16 18
9.52 3/8 16
11.11 7/16 14
12.70 1/2 12
14.29 9/16 12
15.88 5/8 11
17.46 11/16 11
19.05 3/4 10
   
PLEASE CONSULT FOR ANY THREAD OR DIES SIZES NOT SHOWN ON THIS LIST.