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SLS Bearings
SLS Bolts & Nuts
Thread Pitch
Basic thread type information for both metric and imperial sized fasteners.
Metric
NOMINAL
DIAMETERS
PITCHES
Coarse
Fine
M1
0.25
0.2
-
-
-
M1.1
0.25
0.2
-
-
-
M1.2
0.25
0.2
-
-
-
M1.4
0.3
0.2
-
-
-
M1.6
0.35
0.2
-
-
-
M1.8
0.35
0.2
-
-
-
M2
0.4
0.25
-
-
-
M2.2
0.45
0.25
-
-
-
M2.5
0.45
0.35
-
-
-
M3
0.5
0.35
-
-
-
M3.5
0.6
0.35
-
-
-
M4
0.7
0.5
-
-
-
M4.5
0.75
0.5
-
-
-
M5
0.8
0.5
-
-
-
M5.5*
-
0.5
-
-
-
M6
1
0.75
-
-
-
M7
1
0.75
-
-
-
M8
1.25
1
0.75
-
-
M9*
1.25
1
0.75
-
-
M10
1.5
1.25
1
0.75
-
M11*
1.5
1
0.75
-
-
M12
1.75
1.5
1.25
1
-
M14
2
1.5
1.25
1
-
M15*
-
1.5
-
1
-
M16
2
1.5
-
1
-
M17*
-
1.5
-
1
-
M18
2.5
2
1.5
1
-
M20
2.5
2
1.5
1
-
M22
2.5
2
1.5
1
-
M24
3
2
1.5
1
-
M25*
-
2
1.5
1
-
M26*
-
1.5
-
-
-
M27
3
2
1.5
1
-
M28*
-
2
1.5
1
-
M30
3.5
3
2
1.5
1
M32*
-
-
2
1.5
-
M33
3.5
3
2
1.5
-
M35*
-
-
-
1.5
-
M36
4
3
2
1.5
-
M38*
-
-
-
1.5
-
M39
4
3
2
1.5
-
M40*
-
3
2
1.5
-
M42
4.5
4
3
2
1.5
M45
4.5
4
3
2
1.5
M48
5
4
3
2
1.5
M50*
-
-
3
2
1.5
M52
5
4
3
2
1.5
M55*
-
4
3
2
1.5
M56
5.5
4
3
2
1.5
M58*
-
4
3
2
1.5
M60
5.5
4
3
2
1.5
M62*
-
4
3
2
1.5
M64
6
4
3
2
1.5
M65*
6
4
3
2
1.5
M68
6
4
3
2
1.5
M70*
6
4
3
2
1.5
M72
6
4
3
2
1.5
M76
6
4
3
2
1.5
M80
6
4
3
2
1.5
M85
6
4
3
2
-
M90
6
4
3
2
-
M95
6
4
3
2
-
M100
6
4
3
2
-
M105
6
4
3
2
-
M110
6
4
3
2
-
M115
6
4
3
2
-
M120
6
4
3
2
-
M125
6
4
3
2
-
M130
6
4
3
2
-
M135*
6
4
3
2
-
M140
6
4
3
2
-
M145*
6
4
3
2
-
M150
6
4
3
2
-
M155*
6
4
3
-
-
M160
6
4
3
-
-
*3rd Choice
Inch
NOMINAL
DIAMETERS
NO. OF THREADS PER INCH
UNC
UNF
BSW
BSF
1/8
40
44
40
-
5/32
32
36
32
-
3/16
24
32
24
32
1/4
20
28
20
26
5/16
18
24
18
22
3/8
16
24
16
20
7/16
14
20
14
18
1/2
13
20
12
16
9/16
12
18
12
16
5/8
11
18
11
14
3/4
10
16
10
12
7/8
9
14
9
11
1
8
12
8
10
1.1/8
7
12
7
9
1.1/4
7
12
7
9
1.3/8
6
12
6
8
1.1/2
6
12
6
8
1.5/8
5
-
5
8
1.3/4
5
-
5
7
2
4.5
-
4.5
7
2.1/4
4.5
-
4
6
2.1/2
4
-
4
6
2.3/4
4
-
3.5
6
3
4
-
3.5
5
For detailed information, please refer to complete governing standards.
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