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TECHNICAL INFO - Short Machine and Hand Taps - Page 2
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TABLE SHOWS GENERAL DIMENSIONS APPLICABLE TO STANDARD THREAD DESIGNATIONS

NOMINAL DIA d
THREAD DESIGNATIONS
STANDARD COARSE
BLANKS
STANDARD FINE PITCH BLANK SQUARE
ABOVE UP TO &
INC.
ISO
METRIC
COARSE
ISO
METRIC
FINE

UNC

UNF BSW BSF SHANK
DIA D
OVERALL
LENGTH
L
LENGTH
OF
THREAD
MAX
FOR THREADS
FINER THAN

P               TPI
OVERALL
LENGTH
L
LENGTH
OF
THREAD
MAX
ACROSS
FLATS

a
LENGTH
26.50

28.00

30.00

33.50


27.50


42.50


50.00

56.00

63.00

67.00

75.00


80.00


90.00
28.00

30.00

33.50

37.50


42.50


50.00


56.00

63.00

67.00

75.00

80.00


90.00


101.60

M27

M30

M33

M36

M39
M42

M45
M 48

M52
M56

M60

M64

M68

M27 x 2

M30 x 2

M33 X 2


1.1/ 8-7

1.1/ 4-7

1.3/ 8-6


1.1/2-6


1.3/4-5


2-4.1/2

2.1/4-4.1/2

2.1/2-4

2.3/4-4

3-4


3.25-4
3.5-4

3.75-4
4¨ -4


1.1/8-12

1.1/4-12

1.3/8-12


1.1/2-12


1.1/8-7

1.1/4-7




1.1/2-6


1.3/4-5


2-4.1/2

2.1/4-4

2.1/4-4

2.3/4-3.5

3-3.5


3.25-3.25
3.5-3.25

3.75-3
4¨ -3



1.1/8-9

1.1/4-9

1.3/8-8


1.1/2-8
1.5/8-8

1.3/4-7


2-7

2.1/4-6

2.1/2-6

2.75-6

3-5


3.25-5
3.5-4.5

3.75-4.5
4-4.5


20.00

22.40

25.00


28.00


31.50


35.50


40.00


45.00




50.00


56.00

135

138

151

162


170


187


200

221

224

234

258



261

279
45

48

51

57


60


67


70

76

79



83



86

89





2.50












3.00






11











9


127

137

144


149


165


175


193


203





226

244



37





39



45




48








51

54


16.00

18.00

20.00


22.40


25.00


28.00


31.50


35.50





40.00

45.00


20

22

24


26


28


31


34


38





42

46
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