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ANSI STANDARD B18.6.3 MACHINE SCREW
ANSI STANDARD B18.6.4 TAPPING SCREW
BRITISH STANDARD
SIZE
PUNCH DIA"
PHILIPS
USA PZ
PZ
2
7/16
3P10-9
3
3P10-10
4
3P10-11
5
3P20-30
3PZ20-30
6
3P20-15
3PZ20-15
7
9/16
3P20-16
3PZ20-16
8
3P20-17
3PZ20-17
9
3P20-18
10
3P20-19
3PZ20-19
12
7/8
3P30-16
3PZ30-16
14
3P30-17
3PZ30-17
16
1
3P30-18
3PZ30-18
18
3P40-14
20
1 1/4
3P40-15
24
3P40-16
NOT APPLICABLE.
DIN STANDARD