Screw Driver Insert Bits

Insert Bits

Selecting the correct point size

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Point Size Body Diameter Wood Screws Machine Screws Sheet Metal Screws
0 No.0
1
No.0
1
No.0
1
1 3/16 2
3
4
2
3
4
2
3
4
2 1/4 5
6
7
8
9
10
5
6
8
10

5
6
7
8
10
3 5/16 12
14
16
12
1/4
5/16
12
14
5/16
4 3/8 18
20
24
3/8
7/16
1/2
3/8

 

 

Metric/Standard Conversion
Chart for Sheet Metal Screws

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Diameters Lengths
Standard (Inches) Metric (Millimeters) Standard (Inches) Metric (Millimeters)
2
4
6
2.2
2.9
3.5
1/4
3/8
1/2
6.5
9.5
13
7
8
10
3.9
4.2
4.8
5/8
3/4
7/8
16
19
22
12
14
5.5
6.3
1
1-1/4
1-1/2
25
32
38
1-3/4
2
45
50

All D.l.N. and I.S.O. Metric Sheet Metal Screws are actually standard inch sizes that are converted into millimeters. If you are quoting a metric sheet metal screw you can offer a standard sheet metal screw by using this chart.

Example:
#5 x 112 is also 3.5 x 13