HMT 2025 Termékkatalógus - Flipbook - Page 110
HOLEMAKER TECHNOLOGY
Conversion charts & Tapping hole and pitch sizes
Metric to Inch
Metric Coarse Pitch & Hole Size chart
mm
Fractional
Inch
Decimal Inch
0.8
1.6
2.4
3.2
4.0
4.8
6.4
7.1
7.9
8.7
9.5
10.3
11.1
11.9
12.7
13.5
14.3
15.1
15.9
16.7
17.5
18.3
19.1
19.8
20.6
21.4
22.2
23.0
23.8
24.6
25.4
1/32
1/16
3/32
1/8
5/32
3/16
1/4
9/32
5/16
11/32
3/8
13/32
7/16
15/32
1/2
17/32
9/16
19/32
5/8
21/32
11/16
23/32
3/4
25/32
13/16
27/32
7/8
29/32
15/16
31/32
1
0.031
0.063
0.094
0.125
0.156
0.188
0.250
0.281
0.313
0.344
0.375
0.406
0.438
0.469
0.500
0.531
0.563
0.594
0.625
0.656
0.688
0.719
0.750
0.781
0.813
0.844
0.875
0.906
0.938
0.969
1.000
Metric Coarse Galvanised Pitch &
Hole Size chart
Tap
Diameter
Tap Pitch /
TPI
Drill Size
M5.4
M6.4
M8.4
M10.4
M12.4
M16.4
M20.4
M24.4
M30.4
0.8mm
1.0mm
1.25mm
1.5mm
1.75mm
2.0mm
2.5mm
3.0mm
3.5mm
4.2mm
5.0mm
6.8mm
8.5mm
10.2mm
14mm
17.5mm
21mm
26.5mm
BSW Pitch & Hole Size chart
110
Tap
Diameter
Tap Pitch /
TPI
Drill Size
M5
M6
M8
M10
M12
M14
M16
M18
M20
M24
M27
M30
M30
M33
M36
M39
M42
0.8mm
1.0mm
1.25mm
1.5mm
1.75mm
2.0mm
2.0mm
2.5mm
2.5mm
3.0mm
3.0mm
3.5mm
3.5mm
3.5mm
4.0mm
4.0mm
4.5mm
4.2mm
5.0mm
6.8mm
8.5mm
10.2mm
12mm
14mm
15.5mm
17.5mm
21mm
24mm
26.5mm
26.5mm
29.5mm
32mm
35mm
37.5mm
Metric Fine Pitch & Hole Size chart
Tap
Diameter
Tap Pitch /
TPI
Drill Size
M6
M8
M10
M12
M16
M18
M20
M24
0.75mm
1.0mm
1.25mm
1.5mm
1.5mm
1.5mm
1.5mm
1.5mm
4.5mm
7.0mm
8.8mm
10.5mm
14.5mm
16.5mm
18.5mm
22.0mm
BSP Pitch & Hole Size chart
UNC Pitch & Hole Size chart
Tap
Diameter
Tap Pitch /
TPI
Drill Size
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
7/8"
1"
1-1/8"
1-1/4"
1-3/8"
1-1/2"
1-3/4"
20
18
16
13
11
10
9
8
7
7
6
6
5
5.1mm
6.6mm
8.0mm
10.8mm
13.5mm
16.5mm
19.5mm
22.2mm
25.0mm
28.0mm
31.0mm
34.0mm
39.5mm
NPT Pitch & Hole Size chart
Tap
Diameter
Tap Pitch /
TPI
Drill Size
1/8"
1/4"
3/8"
1/2"
3/4"
1"
27
18
18
14
14
11.5
8.5mm
11.0mm
14.5mm
18.0mm
23.0mm
29.0mm
UNF Pitch & Hole Size chart
Tap
Diameter
Tap Pitch /
TPI
Drill Size
Tap
Diameter
Tap Pitch /
TPI
Drill Size
Tap
Diameter
Tap Pitch /
TPI
Drill Size
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
1"
20
18
16
12
11
10
8
5.1mm
6.5mm
7.9mm
10.5mm
13.5mm
16.25mm
22.0mm
1/8"
1/4"
3/8"
1/2"
5/8"
3/4"
1"
28
19
19
14
14
14
11
8.8mm
11.8mm
15.25mm
19mm
21mm
24.5mm
30.75mm
1/4"
3/8"
1/2"
5/8"
3/4"
7/8"
1"
28
20
20
18
16
14
12
5.5mm
8.5mm
11.5mm
14.5mm
17.5mm
20.5mm
23.5mm
