Metric system table

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Specification / Size

Screw Specification table of Metric system

Specification
Length
M2
4
V
V
M2
6
V
V
M3
6
V
8
V
V
V
10
V
V
V
12
V
15
V
V
16
V
20
V
M4
6
– 
V
V
– 
8
– 
V
V
10
V
V
V
V
12
V
V
V
V
15
V
V
V
V
V
20
V
V
V
V
25
V
V
V
V
V
30
V
V
V
M5
10
V
V
V
12
V
15
V
V
V
V
V
18
V
20
V
V
V
V
25
V
V
V
V
30
V
V
V
V
35
V
M6
5
V
10
V
V
V
V
V
12
V
V
V
15
V
V
V
V
V
V
16
V
18
V
20
V
V
V
V
V
25
V
V
V
V
30
V
V
V
V
V
35
V
V
V
V
40
V
V
V
V
V
50
V
M8
10
V
V
V
V
15
V
V
V
V
16
V
20
V
V
V
25
V
V
V
30
V
V
V
35
V
V
V
40
V
V
V
45
V
V
M10
20
V
V
30
V
V
40
V
V
M12
40
V

Screw specification table of British/Inch system

Screw Spec. Length
#0-80UNF 1/8″
#2-56UNC 3/16″
1/4″
5/16″
3/8″
#4-40UNC 1/8″
3/16″
1/4″
5/16″
3/8″
7/16″
1/2″
5/8″
3/4″
7/8″
1″
#6-32UNC 1/4″
5/16″
3/8″
1/2″
5/8″
3/4″
7/8″
1″
#8-32UNC 1/4″
5/16″
3/8″
1/2″
5/8″
3/4″
7/8″
1″
#8-36UNF 3/8″
1/2″
5/8″
3/4″
#10-24UNC 3/8″
1/2″
5/8″
3/4″
7/8″
1″
#10-32UNF 3/8″
1/2″
5/8″
3/4″
7/8″
1″
1/4-20UNC 1/4″
3/8″
5/8″
3/4″
7/8″
1″
1/4-28UNF 3/4″
1″
1 1/2″
5/16-18UNC 1″
1 1/2″
5/16-24UNF 1″
1 1/2″
3/8-16UNC 1″
1 1/2″
3/8-24UNF 1″
1 1/2″
Nut Spec. #10-32 UNF-2B
#4-40
#6-32
#8-32

Socket Set Screws

Socket Set Screws
L
Socket
M4
8
V
M5
8
V
M5
10
V
M5
20
V
M6
6
V
M6
8
V
M6
10
V
M6
12
V
1/4-20UNC
3/8″
V

Micro Screws Spec.

Specification
Length
M1.4
2
V
3
V
M1.6
3
V

Diagram of Nut size

Nut Specification table of Metric system

NUT
M3
M4
M5
M6
M8
M10
M12
M16
B*H
5.5*2.4
7*3.2
8*4
10*5
13*6.5
17*8
19*10
23.5*16
pitch
0.5
0.7
0.8
1
1.25
1.5
1.5
2

Nut – British System

#4-40 UNC
#6-32 UNC
#8-32 UNC
#10-32 UNF