Alfa Tools General Product Catalog

Screwdriver Bits Information Chart

BIT SELECTION CHART

Locate the type and size of screw you will be driving for each type of fastener Then move to the left column to find the point size you need

PHILLIPS ®

wOOD SCREw SIZE

MACHINE SCREw SIZE

SHEET METAL SCREw SIZE

POINT SIZE

FLAT, OvAL

FLAT, OvAL,

ROUND,

TRUSS,

FLAT, OvAL, ROUND, STOvE, BINDING

ROUND

BINDING

FILLISTER

BRAZIER BUTTON

0 1 2 3 4

0, 1

0, 1

0, 1

0, 1

0, 1

0, 1

2, 3, 4

2, 3, 4

2, 3, 4

2, 3, 4

2, 3, 4, 5 6, 8, 10

2, 3, 4

5, 6, 7, 8, 9

5, 6, 7, 8, 9, 10

5, 6, 7, 8, 10

5, 6, 7, 8, 10

5, 6, 7, 8, 10

10, 12, 14, 16 12, 14, 16

12, 14

12, 1/4", 5/16" 12, 1/4"

12, 14

18, 20, 24

18, 20, 24

5/16", 3/8", 7/16", 1/2" 3/8", 7/16", 1/2" 5/16", 3/8", 7/16", 1/2"

—

SLOTTED ®

SQUARE RECESS

SCREw SLOT wIDTH

SQUARE RECESS

TAPPING

wOOD

MACHINE

SLOTTED POINT SIZE

POINT SIZE

SCREw SIZE SCREw SIZE SCREw SIZE

MINIMUM

MAXIMUM

0 1 2 3

3, 4

3, 4

3, 4 5, 6

1 - 2 2 - 3 3 - 4 4 - 5 6 - 8

0 019 0 023 0 027 0 031 0 035 0 039 0 045 0 056

0 026 0 031 0 035 0 039 0 043 0 048 0 054 0 067

5, 6, 7 8, 10 12, 14

5, 6, 7 8, 9, 10 12, 14

8, 10 12, 14

SAE Fractional HEX

8 - 10 10 - 12 12 - 14

POINT

SOCKET HEAD CAP SCREw SIZE

SET SCREw

SIZE

SIZE

5/64" 3/32" 7/64" 5/32" 3/16" 7/32" 1/8"

2, 3 4, 5

8

TORX ®

10 —

6

TORX ®

TORX ®

— 10

1/4"

POINT SIZE

DIA.

5/16"

T6 T7 T8 T9

0 065 0 077 0 090 0 097 0 107 0 128 0 151 0 173 0 195 0 216 0 260 0 306 0 346 0 440

1/4"

3/8"

—

7/16"

Screwdriver Bits Information Chart

1/4"

5/16"

1/2" 5/8" 3/4"

5/16"

3/8"

T10 T15 T20 T25 T27 T30 T40 T45 T50 T55

3/8"

7/16", 1/2"

E

Metric

M2 0 M2 5 M3 0 M4 0 M5 0 M6 0

M2 3, 2 5, 2 6

M4 M5 M6 M8

M3 M4 M5 M6 M8

M10

M12, 14

General Information:

Nut Setters

Popular for the pre-engineered building industry For use with Hex Head Screws 1/4" Hex Shank Use in conjunction with insert bits Magnetic "Extra heavy duty" bit holders have "C" ring retainers One or two piece construction

Bit Holders

Extensions/

Adapts a hand driver or drill into a socket wrench

Socket Adapters

E-2