Taps


NC | NF | NEF
8, 12 & 14 TPI series

pipe sizes: NPT, NPS




National Coarse


NC

Size
Number
Or Inch


Pitch
TPI


No 1
No 2
No 3

No 4
No 5
No 6

No 8
No 10
No 12

1/4
5/16
3/8

7/16
1/2
9/16

5/8
3/4
7/8

1
1-1/8
1-1/4

1-3/8
1-1/2
1-3/4

2
2-1/4
2-1/2
64
56
48

40
40
32

32
24
24

20
18
16

14
13
12

11
10
9

8
7
7

6
6
5

4.5
4.5
4

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-20.1 for 1/4-20 taper tap
TAP1/4-20.2 for 1/4-20 plug tap
TAP1/4-20.3 for 1/4-20 bottoming tap
TAP1/4-20SP for 1/4-20 spiral pointed tap
TAP1/4-20QS for 1/4-20 quick spiral tap
TAP1/4-20NUT for 1/4-20 nut tap

 



National Fine


NF

Size
Number
Or Inch


Pitch
TPI
No 0
No 1
No 2

No 3
No 4
No 5

No 6
No 8
No 10

No 12
1/4
5/16

3/8
7/16
1/2

9/16
5/8
3/4

7/8
1
1-1/8

1-1/4
1-3/8
1-1/2
80
72
64

56
48
44

40
36
32

28
28
24

24
20
20

18
18
16

14
12
12

12
12
12

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-28.1 for 1/4-28 taper tap
TAP1/4-28.2 for 1/4-28 plug tap
TAP1/4-28.3 for 1/4-28 bottoming tap
TAP1/4-28SP for 1/4-28 spiral pointed tap
TAP1/4-28QS for 1/4-28 quick spiral tap
TAP1/4-28NUT for 1/4-28 nut tap




National Extra Fine



NEF

Size
Number
Or Inch


Pitch
TPI
1/4
5/16
3/8

1/2
5/8
3/4

7/8
1
1-1/8

1-3/8
32
32
32

28
24
20

20
20
18

18

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-32.1 for 1/4-32 taper tap
TAP1/4-32.2 for 1/4-32 plug tap
TAP1/4-32.3 for 1/4-32 bottoming tap




8 12 And 14 TPI Series



8,12 & 14 TPI series

Size
Number
Or Inch


Pitch
TPI
(8 TPI Thread Series)
1-1/8
1-1/4
1-3/8

1-1/2
1-5/8
1-3/4

1-7/8
2
2-1/4

2-1/2
8
8
8

8
8
8

8
8
8

8
(12 TPI Thread Series)
1-1/16
1-3/16
1-5/16

1-5/8
1-3/4
1-7/8

2
2-1/4
2-1/2
12
12
12

12
12
12

12
12
12
(14 TPI Thread Series)
1 14

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1-14.1 for 1-14 taper tap
TAP1-14.2 for 1-14 plug tap
TAP1-14.3 for 1-14 bottoming tap


National Pipe Straight Taps

NPS

National Pipe Straight


Size
Number


Pitch
TPI
1/8
1/4
3/8

1/2
3/4
1

1-1/4
1-1/2
2
27
18
18

14
14
11-1/2

11-1/2
11-1/2
11-1/2

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4NPS for1/4 NPS tap



National Pipe Taper Taps

NPT

National Pipe Taper


Size
Number


Pitch
TPI
1/16
1/8
1/4

3/8
1/2
3/4

1
1-1/4
1-1/2

2
27
27
18

18
14
14

11-1/2
11-1/2
11-1/2

11-1/2

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4NPT for1/4 NPT tap

link to tap and die index page

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