Short Machine Hand Taps 2

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Table Shows General Dimensions Applicable to Standard Thread Designations

Nominal Dai d
Thread Designations Standard Coarse Blanks Standard Fine Pitch Blanks 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
26.5 28 M27 M27 x 2 135 45
28 30 M30 M30 x 2 1.1/ 8-7 1.1/8-12 1.1/8-7 1.1/8-9 20 138 48 127 16 20
37
30 33.5 M33 M33 X 2 1.1/ 4-7 1.1/4-12 1.1/4-7 1.1/4-9 22.4 151 51 137 18 22
2.50
33.5 37.5 M36 1.3/ 8-6 1.3/8-12 1.3/8-8 25 162 57 11 144 20 24
M39
27.5 42.5 M42 1.1/2-6 1.1/2-12 1.1/2-6 1.1/2-8
1.5/8-8
28 170 60 149 39 22.4 26
M45
42.5 50 M48 1.3/4-5 1.3/4-5 1.3/4-7 31.5 187 67 165 25 28
45
M52
50 56 M56 2-4.1/2 2-4.1/2 2-7 35.5 200 70 175 28 31
56 63 M60 2.1/4-4.1/2 2.1/4-4 2.1/4-6 221 76
40 3 9 193 48 31.5 34
63 67 M64 2.1/2-4 2.1/4-4 2.1/2-6 224 79
67 75 M68 2.3/4-4 2.3/4-3.5 2.75-6 45 234 203 35.5 38
75 80 3-4 3-3.5 3-5 258 83
80 90 3.25-4 3.25-3.25 3.25-5 50
3.5-4 3.5-3.25 3.5-4.5 261 86 226 51 40 42
90 101.6 3.75-4 3.75-3 3.75-4.5 56 279 89 244 54 45 46
4¨ -4 4¨ -3 4-4.5

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