Conversions

 

 

Bolt Size

Standard

Metric

1/8"

5/16

8 mm

3/16"

3/8

10 mm

1/4"

7/16

11 mm

5/16"

1/2

13 mm

3/8"

9/16

14 mm

7/16"

5/8

16 mm

1/2"

3/4

19 mm

9/16"

13/16

21 mm

5/8"

15/16

24 mm

3/4"

1 1/8

28 mm

7/8"

1 5/16

---------

1"

1 1/2

---------

 

 

BOLTS - SCREWS

WRENCH OR SOCKET
SIZE
ACROSS
FLATS
DECIMAL
EQUIV.
SQUARE
AND HEX
BOLTS, CAP
SCREWS &
SQUARE &
HEX LAG
SCREWS
HEAVY
BOLTS &
SCREWS
HEX
FLANGE
SCREWS
TAPPING HEX
WASHER
HEAD
TAPPING
SCREWS
HEX
HEAD
MACHINE
SCREWS
HEX
WASHER
HEAD
MACHINE
SCREWS
SQUARE
HEAD
SET
SCREWS
1/8 0.1250 - - - #1&2 #2&3 #1&2 #1&2 -
5/332 0.1562 - - - - - - - -
3/16 0.1875 - - - #3,4,5 #3,4,5 #3,4,5 #3,4,5 #10
1/4 0.2500 - - - #6,7,8 #6,7,8 #6&8 #6&8 1/4
9/32 0.2812 #10 - - - - - - -
5/16 0.3125 - - - #10&12 #10&12 #10&12 #10&12 5/16
11/32 0.3438 - - - - - - - -
3/8 0.3750 1/4 - 1/4 1/4 1/4 1/4 1/4 3/8
7/16 0.4375 1/4 - - - - - 7/16 1/4
1/2 0.5000 5/16 - 5/16 5/16 5/16 5/16 5/16 1/2
9/16 0.5625 3/8 - 3/8 3/8 3/8 3/8 3/8 9/16
5/8 0.6250 7/16 - 7/16 - - - - 5/8
11/16 0.6875 - - - - - - - -
3/4 0.7500 1/2 - 1/2 - - - - 3/4
13/16 0.8125 9/16 - 9/16 - - - - -
7/8 0.8750 - 1/2 - - - - - 7/8
15/16 0.9375 5/8 - 5/8 - - - - -
1 1.0000 - - - - - - - 1
1 1/16 1.0625 - 5/8 - - - - - -
1 1/8 1.1250 3/4 - 3/4 - - - - 1 1/8
1 1/4 1.2500 - 3/4 - - - - - 1 1/4
1 5/16 1.3125 7/8 - - - - - - -
1 3/8 1.3750 - - - - - - - 1 3/8
1 7/16 1.4375 - 7/8 - - - - - -
1 1/2 1.5000 1 - - - - - - 1 1/2
1 5/8 1.6250 - 1 - - - - - -
1 11/16 1.6875 1 1/8 - - - - - - -
1 13/16 1.8125 - 1 1/8 - - - - - -
1 7/8 1.8750 1 1/4 - - - - - - -
2 2.0000 - 1 1/4 - - - - - -
2 1/16 2.0625 1 3/8 - - - - - - -
2 3/16 2.1875 - 1 3/8 - - - - - -
2 1/4 2.2500 1 1/2 - - - - - - -
2 3/8 2.3750 - 1 1/2 - - - - - -
2 7/16 2.4375 1 5/8 - - - - - - -
2 9/16 2.5625 - 1 5/8 - - - - - -
2 5/8 2.6250 1 3/4 - - - - - - -
2 3/4 2.7500 - 1 3/4 - - - - - -
2 13/16 2.1825 1 7/8 - - - - - - -
2 15/16 2.9375 - 1 7/8 - - - - - -
3 3.0000 2 - - - - - - -
3 1/8 3.1250 - 2 - - - - - -
3 3/8 3.3750 2 1/4 - - - - - - -
3 1/2 3.5000 - 2 1/4 - - - - - -
3 3/4 3.7500 2 1/2 - - - - - - -
3 7/8 3.8750 - 2 1/2 - - - - - -
4 1/8 4.1250 2 3/4 - - - - - - -
4 1/4 4.2500 - 2 3/4 - - - - - -
4 1/2 4.5000 3 - - - - - - -
4 5/8 4.6250 - 3 - - - - - -
4 7/8 4.8750 3 1/4 - - - - - - -
5 5.0000 - 3 1/4 - - - - - -
5 1/4 5.2500 3 1/2 - - - - - - -
5 3/8 5.3750 - 3 1/2 - - - - - -
5 5/8 5.6250 3 3/4 - - - - - - -
5 3/4 5.7500 - 3 3/4 - - - - - -
6 6.0000 4 - - - - - - -
6 1/8 6.1250 - 4 - - - - - -
6 1/2 6.5000 - 4 1/4 - - - - - -
6 7/8 6.8750 - 4 1/2 - - - - - -
7 1/4 7.2500 - 4 3/4 - - - - - -
7 5/8 7.6250 - 5 - - - - - -
8 8.0000 - 5 1/4 - - - - - -
8 3/8 8.3750 - 5 1/2 - - - - - -
8 3/4 8.7500 - 5 3/4 - - - - - -
9 1/8 9.1250 - 6 - - - - - -

 

 

 

NUTS

SQUARE
NUTS
& HEAVY
SQUARE NUTS
TRACK,
HEAVY HEX
& SQUARE,
FLAT AND
JAM NUTS
SQUARE
MACHINE
SCREW NUT
HEX NUTS
& FLAT
CSTLE.
SLOTTED
AND HAM
HEX NUT
HEX
FLANGE
NUTS
TRACK
BOLT
NUTS
SIZE
HEX
LOCK
NUTS
- - #0&1 - - - -
- #2&3 - - - - -
- - #4 - - - #4
- - - - - - -
- - #5&6 - #6 - #6
- - #8 - #8 - #8
- - #10 - #10 - #10
- - #12&14 1/4 #12&14 - #12&14
1/4 1/4 - 5/16 5/16 - 5/16
5/16 5/16 5/16 3/8 3/8 - 3/8
3/8 - 3/8 - - - -
3/8 3/8 - 7/16 7/16 - 7/16
7/16 7/16 - 1/2 1/2 - 1/2
1/2 - - - - - -
1/2 1/2 - 9/16 9/16 - 9/16
- 9/16 - 5/8 5/8 - 5/8
5/8 - - - - - -
5/8 5/8 - - - - -
3/4 - - 3/4 3/4 - 3/4
3/4 3/4 - - - 3/4&13/16 -
7/8 - - 7/8 - - 7/8
- - - - - - -
7/8 7/8 - - - 7/8 -
1 - - 1 - 15/16&1 1
1 1 - - - 1&1 1/16 -
1 1/8 - - 1 1/2 - 1 1/8 1 1/8
1 1/8 1 1/8 - - - 1 1/8 -
1 1/4 - - 1 1/4 - - 1 1/4
1 1/4 1 1/4 - - - - -
1 3/8 - - 1 3/8 - - 1 3/8
1 3/8 1 3/8 - - - - -
1 1/2 - - 1 1/2 - - 1 1/2
1 1/2 1 1/2 - - - - -
- 1 5/8 - - - - -
- 1 3/4 - - - - -
- 1 7/8 - - - - -
- 2 - - - - -
- 2 1/4 - - - - -
- 2 1/2 - - - - -
- 2 3/4 - - - - -
- 3 - - - - -
- 3 1/4 - - - - -
- 3 1/2 - - - - -
- 3 1/2 - - - - -
- 3 3/4 - - - - -
- 3 3/4 - - - - -
- 4 - - - - -
- 4 - - - - -

 

BOLTS

NUTS

WRENCH OR
SOCKET
SIZE
ACROSS
FLATS
HEX
BOLTS
HEAVY
HEX
BOLTS
HEAVY
HEX
STRUCTURAL
BOLTS
HEX
NUTS
STYLE 1
HEX
NUTS
STYLE 2
SLOTTED
AND HAM
HEX NUTS
HEAVY
HEX
NUTS
WRENCH OR
SOCKET
SIZE
ACROSS
FLATS

Use wrench or socket size shown below

Use wrench or socket size shown below

3.20 -- -- -- M1.6 x 0.35 -- -- -- 3.20
4.00 -- -- -- M2 x 0/4 -- -- -- 4.00
5.00 -- -- -- M2.5 x 0.45 -- -- -- 5.00
5.50 -- -- -- M3 x 0.5 M3 X 0.5 -- -- 5.50
6.00 -- -- -- M3.5 x 0.6 M3.5 x 0.6 -- -- 6.00
7.00 -- -- -- M4 x 0.7 M4 x 0.7 -- -- 7.00
8.00 M5 x 0.8 -- -- M5 x 0. 8 M5 x 0. 8 M5 x 0. 8 -- 8.00
10.00 M6 x 1 -- -- M6 x 1 M6 x 1 M6 x 1 -- 10.00
13.00 M8 x 1.25 -- -- M8 x 1.25 M8 x 1.25 M8 x 1.25 -- 13.00
15.00 M10 x 1.5 -- -- M10 x 1.5 M10 x 1.5 M10 x 1.5 -- 1500
16.00 M10 x 1.5 -- -- M10 x 1.5 M10 x 1.5 M10 x 1.5 -- 1600
18.00 M12 x 1.75 -- -- M12 x 1.75 M12 x 1.75 M12 x 1.75 -- 1800
21.00 M14 x 2 M12 x 1.75 -- M14 x 2 M14 x 2 M14 x 2 M12 x 1.75 21.00
24.00 M16 x 2 M14 x 2 -- M16 x 2 M16 x 2 M16 x 2 M14 x 2 24.00
27.00 -- M16 x 2 M16 x 2 -- -- -- M16 x 2 27.00
30.00 M20 x 2.5 -- -- M20 x 2.5 M20 x 2.5 M20 x 2.5 -- 30.00
34.00 -- M20 x 2.5 M20 x 2.5 -- -- -- M20 x 2.5 34.00
36.00 M24 x 3 -- M22 x 2.5 M24 x 3 M24 x 3 M24 x 3 M22 x 2.5 36.00
41.00 -- M24 x 3 M24 x 3 -- -- -- M24 x 3 41.00
46.00 M30 x 3.5 -- M27 x 3 M30 x 3.5 M30 x 3.5 M30 x 3.5 M27 x 3 46.00
50.00 -- M30 x 3.5 M30 x 3.5 -- -- -- M30 x 3.5 50.00
55.00 M36 x 4 -- -- M36 x 4 M36 x 4 M36 x 4 -- 55.00
60.00 -- M36 x 4 M36 x 4 -- M36 x 4 60.00 -- --
65.00 M42 x 4.5 -- -- -- -- -- -- 65.00
70.00 -- -- -- -- -- -- M42 x 4.5 70.00
75.00 M48 x 5 -- -- -- -- -- -- 75.00
80.00 -- -- -- -- -- -- M48 x 5 80.00
85.00 M56 x 5.5 -- -- -- -- -- -- 85.00
90.00 -- -- -- -- -- -- M56 x 5.5 90.00
95.00 M64 x 6 -- -- -- -- -- - 95.00
100.00 -- -- -- -- -- -- M64 x 6 100.00
105.00 M72 x 6 -- -- -- -- -- - 105.00
110.00 -- -- -- -- -- -- M72 x 6 110.00
115.00 M80 x 6 -- -- -- -- -- - 115.00
120.00 -- -- -- -- -- -- M80 x 6 120.00
130.00 M90 x 6 -- -- -- -- -- - 130.00
135.00 -- -- -- -- -- -- M90 x 6 135.00
145.00 M100 x 6 -- -- -- -- -- - 145.00
150.00 -- -- -- -- -- - M100 x 6 150.00