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Drive Sizes for Phillips Screws

 Phillips’s screwdrivers are available in five different sizes, ranging from zero(smallest) to four (largest).

Phillips head screwdrivers are built to work with the same screws, only those with crossheads instead. Since there are only five sizes of Phillips head screwdrivers, they each fit at least two sizes of a screw, but sometimes can even fit up to five like with the #2.

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Phillips
Screw Diameter

Drive size

Machine Screws

Sheet Metal Screws

Wood screws

Flat

Round

#2

#1

#1

#1

#1

#3

N/A

#1

#1

#1

#4

#1

#1

#1

#1

#5

N/A

#2

#2

#2

#6

#2

#2

#2

#2

#7

N/A

#2

#2

#2

#8

#2

#2

#2

#2

#9

N/A

#2

#2

#2

#10

#2

#2

#3

#2

#12

#3

#3

#3

#3

#14

N/A

#3

#3

#3

1/4"

#3

N/A

5/16"

#4

3/8"

#4

 

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