Short Machine Hand Taps

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Table Shows General Dimensions Applicable to Standard Thread Designations


Nominal Dai d
Thread Designations Overall
Length
Length
of
Thread
Length
of
Neck
Dia
of
Neck
Dia
of
Shank
Length
of
Square
Size
of
Square
Style Types
Above Up To ISO Metric Coarse ISO Metric Fine UNC UNF BSW BSF BA L

d2 d 12 a

1.4 1.8 M1.6
1 STRAIGHT
M1.8 No. 0-80 10 & 11 41 8 5 2.5 4 2 FLUTE
1.8 2 M2 No. 1-64 No. 1-72 9 41 8 5.5 2.5 4 2 SPIRAL POINT
M2.2 No. 2-56 No. 2-64 FLUTELESS
2 2.8 M2.5 M2. 5X0.36 No. 3-48 No. 3-56 8,7 & 6 44.5 9.5 6 2.8 5 2.24
2.8 3.2 M3 M3x0.35 No. 4-40 No. 4-48 2
No. 5-40 No. 5-44 1/8-40 5 48 11 7 2.2 3.15 5 2.5
3.2 3.6 M3.5 M3.5x0.35 No. 6-32 No. 6-40 4 50 13 7 2.5 3.55 5 2.8 STRAIGHT
3.6 4 M4 M4x0.5 53 13 8 2.8 4 6 3.15 FLUTE
4 4.5 M4.5 M4.5x0.5 No. 8-32 No. 8-36 3 53 13 8 3.15 4.5 6 3.55 SPIRAL POINT
4.5 5 M5x0.5 No. 10-24 No. 10-32 3/16-24 3/16-32 2 58 16 9 3.6 5 7 4 QUICK SPIRAL
5 5.6 No. 12-24 No. 12-28 7/32-28 1 62 17 9 4.25 5.6 7 4.5 FLUTELESS
5.6 6.35 M6 M6x0.75 1/4-28 1/4-28 1/4-20 1/4-26 0 66 18 11 4.5 6.3 8 5 LONG SHANK MACHINE
6.35 7.2 M7 M7x0.75 9/32-26 66 18 11 5.3 7.1 8 5.6
7.2 8 M8 M8x1 5/16-18 5/16-18 5/16-18 5/16-22 72 20 13 6 8 9 6.3
8 9 M9 72 20 15 7.1 9 10 7.1
9 10 M10 M10 x1.25 3/8-24 3/8/-16 3/8-16 3/8-20 80 22 16 7.5 10 11 8
10 10.6 84 22 7.1 8 5.6 3 STRAIGHT
10.6 11.8 M11 7/16-14 7/16-20 7/16-14 7/16-18 85 22 8 9 6.3 FLUTE
11.8 13.2 M12 M12x1.25 1/2-13 1/2-20 1/2-13 1/2-16 89 24 9 10 7.1 SPIRAL POINT
13.2 15 M14 M14x1.5 9/16-12 9/16-18 9/16-12 9/16-16 95 26 11.2 12 9 QUICK SPIRAL
15 17 M16 M16x1.5 5/8-11 5/8-18 5/8-11 5/8-14 102 27 12.5 13 10 LONG SHANK MACHINE
17 21.2 M18 M18x1.5 11/16-11 11/16-14 FLUTELESS
M20 M20x1.5 3/4-10 3/4-16 3/4-10 3/4-12 112 32 14 14 11.2
21.2 23.6 M22 M22x1.5 7/8-09 7/8-14 7/8-09 7/8-11 118 34 16 16 12.5
23.6 26.5 M24 M24 x2 1-8 1-12 1-8 1-10 130 40 18 18 14

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