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 |
|
|
