Square
head drive
Part Name
dimensions S
10 mm
12 mm
13 mm
14 mm
1/2"
Hexagonal
17 mm
(12.7 mm)
Socket
19 mm
21 mm
22 mm
24 mm
3. Long Socket
Form B
L1
H
L2
L
Square
head drive
Part Name
dimensions S
12 mm 955138
13 mm 955139
14 mm 955140
17 mm 955141
17 mm 955149
1/2"
Long
19 mm 955142
(12.7 mm) Socket
19 mm 955150
21 mm 955143
21 mm 955151
21 mm 991480
22 mm 955144
24 mm 955146
Suitable Bolt Diameter
Code No.
High
ISO
tension (ordinary) (small)
944291
M6
873632
873539
M8
873540
873536
M10
873624
M12
873626
873627
M12
M14
873629
M16
Form C
S
H
Suitable Bolt Diameter
Code
High
ISO
ISO
No.
tension (ordinary) (small)
M8
M10
M10
M12
M10
M12
M12
M14
M12
M14
M12
M14
M16
M16
M18
Hexagonal
width across
ISO
Inch
flats H
bolts
25/64"
(10 mm)
15/32"
M8
W5/16"
(12 mm)
33/64"
(13 mm)
9/16"
M10
(14 mm)
11/16"
M12
W3/8"
(17 mm)
3/4"
M14
W7/16"
(19 mm)
13/16"
W1/2"
(21 mm)
7/8"
M16
(22 mm)
15/16"
M18
(24 mm)
L1
L2
S
L
Hexagonal
width across Form
Inch
bolts
flats H
15/32"
M8
W5/16"
(12 mm)
33/64"
(13 mm)
9/16"
(14 mm)
11/16"
W3/8"
(17 mm)
11/16"
W3/8"
(17 mm)
3/4"
W7/16"
(19 mm)
3/4"
W7/16"
(19 mm)
13/16"
W1/2"
(21 mm)
13/16"
W1/2"
(21 mm)
13/16"
W1/2"
(21 mm)
7/8"
(22 mm)
15/16"
(24 mm)
Main Socket
Dimensions
Form
L
1-9/16"
5/16"
B
(40 mm)
(8 mm)
1-9/16"
5/16"
B
(40 mm)
(8 mm)
1-9/16"
11/32"
B
(40 mm)
(9 mm)
1-9/16"
11/32"
B
(40 mm)
(9 mm)
1-1/4"
5/16"
C
(32 mm)
(8 mm)
1-11/32"
11/32"
C
(34 mm)
(9 mm)
1-13/32"
3/8"
D
(36 mm) (10 mm) (32 mm)
1-9/16"
9/16"
D
(40 mm) (14 mm) (35 mm)
1-9/16"
9/16"
D
(40 mm) (15 mm) (38 mm)
Form D
L1
H
L2
L
Main Socket
Dimensions
L
L1
2-3/64"
25/32"
1-11/32"
B
(52 mm) (20 mm) (34 mm) (20 mm)
2-3/64"
25/32"
1-11/32"
B
(52 mm) (20 mm) (34 mm) (21.5 mm)
2-3/64"
25/32"
1-11/32"
B
(52 mm) (20 mm) (34 mm) (22 mm)
2-3/64"
15/16"
1-11/32"
B
(52 mm) (24 mm) (34 mm) (25 mm)
2-15/16"
15/16"
2-1/4"
B
(75 mm) (24 mm) (57 mm) (25 mm)
2-3/64"
15/16"
1-11/32"
B
(52 mm) (24 mm) (34 mm) (28 mm)
2-15/16"
15/16"
2-1/4"
B
(75 mm) (24 mm) (57 mm) (28 mm)
2-3/64"
15/16"
1-11/32"
D
(52 mm) (24 mm) (34 mm) (31 mm)
2-15/16"
15/16"
2-1/4"
D
(75 mm) (24 mm) (57 mm) (31 mm)
4-15/16"
15/16"
4-7/32"
D
(125 mm) (24 mm) (107 mm) (31 mm)
2-3/64"
15/16"
1-11/32"
D
(52 mm) (24 mm) (34 mm) (32.5 mm)
2-3/64"
63/64"
1-11/32" 1-11/32"
D
(52 mm) (25 mm) (34 mm) (34 mm)
English
L1
øF
11/16"
(18 mm)
25/32"
(20 mm)
1"
(25 mm)
1"
(25 mm)
1-3/32"
(28 mm)
1-3/32"
(28 mm)
1-1/4"
1-3/8"
1-1/2"
S
L2
øF
25/32"
53/64"
7/8"
1"
1"
1-3/32"
1-3/32"
1-7/32"
1-7/32"
1-7/32"
1-9/32"
21