11320 FM 529 RD BLDG F
HOUSTON, TEXAS 77041
TEL (713) 896-1166
FAX (713) 896-7879
Tool Size Chart
Wrench Size
Diameter
Hex Key Size
Inch Fasteners
Diameter
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 3/4
2
2 1/4
2 1/2
2 3/4
3
Wrench Sizes (in.)
Hex
7/16
1/2
9/16
5/8
3/4
13/16
15/16
1 1/8
1 5/16
1 1/2
1 11/16
1 7/8
2 1/16
2 1/4
2 5/8
3
3 3/8
3 3/4
4 1/8
4 1/2
Heavy Hex
7/8
1 1/16
1 1/4
1 7/16
1 5/8
1 13/16
2
2 3/16
2 3/8
2 3/4
3 1/8
3 1/2
3 7/8
4 1/4
4 5/8
Metric Fasteners
Hex Key Sizes (in.)
Diameter
#1
#2
#3
#4
#5
#6
#8
#10
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
Socket
1/16
5/64
5/64
3/32
3/32
7/64
9/64
5/32
3/16
1/4
5/16
3/8
3/8
1/2
5/8
3/4
3/4
7/8
7/8
1
1
Wrench & Hex Key Sizes (mm)
Diameter
M3
M4
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M42
M48
Hex
5.50
7.00
8.00
10.00
13.00
17.00
19.00
21.00
24.00
27.00
30.00
32.00
36.00
41.00
46.00
50.00
55.00
65.00
75.00
Socket
2.50
3.00
4.00
5.00
6.00
8.00
10.00
12.00
14.00
14.00
17.00
17.00
19.00
19.00
22.00
24.00
27.00
32.00
36.00
www.northwestfastener.com