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Nuts
There are hundreds of shapes & sizes of nuts. Nuts have internal threads that correspond to the external threads of a bolt. The type of steel and the treatment of the material during manufacture determine the strength & ability to perform. It is important to note that grades & finishes of nuts MUST match those of the accompanying bolt. Hex nuts are made to SAE (Society of Automotive Engineers) standard J429, various ASTM (American Society for Testing and Materials) standards and ISO (International Organization for Standardization) standards. Examples of SAE J429 standards are Grade 2, Grade 5, & Grade 8. Examples of ASTM Standards are A563 and A194 with grades of A, C, DH & 2H. Examples of ISO standards are property classes 8.8 and 10.9. The nut’s width size is determined by measuring across the flats of the hexagon. The nut’s width determines the wrench or socket size to use when tightening. Hex Nuts come in a variety of finishes. Plain finish, zinc plated, yellow zinc plated and hot-dipped galvanized are most common. Use Hot-Dipped Galvanized Nuts with Hot Dipped Galvanized Bolts ONLY because the threads of the nut are tapped oversized to account for the heavy galvanized coating on the bolt. Be sure to match the grade & finish of your nut with the bolt for a proper assembly.
Diameter
Thread Size
Finish
Grade
Specification
Order Qty Increment
Price
1/4"
20
Plain
NA
100
5/16"
18
Plain
NA
100
3/8"
16
Plain
NA
50
1/2"
13
Plain
NA
25
1/4"
20
HDG
2
100
5/16"
18
HDG
2
100
3/8"
16
HDG
2
50
1/2"
13
HDG
2
25
5/8"
11
HDG
2
10
1/4"
20
ZP
NA
100
Please call
5/16"
18
ZP
NA
100
3/8"
16
ZP
NA
50
Please call
1/2"
13
ZP
NA
25
5/8"
11
ZP
NA
10
3/4"
10
ZP
NA
10
3/8"
16
Plain
2H
A194
50
1/2"
13
Plain
2H
A194
25
5/8"
11
Plain
2H
A194
10
3/4"
10
Plain
2H
A194
10
7/8"
9
Plain
2H
A194
5
1"
8
Plain
2H
A194
5
1-1/8"
7
Plain
2H
A194
5
1-1/4"
7
Plain
2H
A194
5
1-1/2"
6
Plain
2H
A194
5
1-3/4"
5
Plain
2H
A194
5
1"
8
Plain
18-8
A194
5
Please call
1/4"
20
Plain
A
A563
100
5/16"
18
Plain
A
A563
100
3/8"
16
Plain
A
A563
50
1/2"
13
Plain
A
A563
25
5/8"
11
Plain
A
A563
10
3/4"
10
Plain
A
A563
10
7/8"
9
Plain
A
A563
5
1"
8
Plain
A
A563
5
1/4"
20
ZP
A
A563
100
5/16"
18
ZP
A
A563
100
3/8"
16
ZP
A
A563
50
7/16"
14
ZP
A
A563
25
1/2"
13
ZP
A
A563
25
5/8"
11
ZP
A
A563
10
3/4"
10
ZP
A
A563
10
7/8"
9
ZP
A
A563
5
1"
8
ZP
A
A563
5
1-1/4"
7
ZP
A
A563
5
1-3/4"
5
ZP
A
A563
5
#10
32
Plain
18-8
F594
100
1/4"
20
Plain
18-8
F594
100
5/16"
18
Plain
18-8
F594
100
3/8"
16
Plain
18-8
F594
50
7/16"
14
Plain
18-8
F594
25
1/2"
13
Plain
18-8
F594
25
5/8"
11
Plain
18-8
F594
10
3/4"
10
Plain
18-8
F594
10
7/8"
9
Plain
18-8
F594
5
1"
8
Plain
18-8
F594
5
1-1/4"
7
Plain
18-8
5
1/4"
20
ZP
2
SERIESNE
100
5/16"
18
ZP
2
SERIESNE
100
3/8"
16
ZP
2
SERIESNE
50
7/16"
14
ZP
2
SERIESNE
25
1/2"
13
ZP
2
SERIESNE
25
5/8"
11
ZP
2
SERIESNE
10
3/4"
10
ZP
2
SERIESNE
10
7/8"
9
ZP
2
SERIESNE
5
1"
8
ZP
2
SERIESNE
5
#8
32
Plain
18-8
SERIESNE
100
#10
32
Plain
18-8
SERIESNE
100
1/4"
20
Plain
18-8
SERIESNE
100
5/16"
18
Plain
18-8
SERIESNE
100
3/8"
16
Plain
18-8
SERIESNE
50
7/16"
14
Plain
18-8
SERIESNE
25
1/2"
13
Plain
18-8
SERIESNE
25
5/8"
11
Plain
18-8
SERIESNE
10
3/4"
10
Plain
18-8
SERIESNE
10
7/8"
9
Plain
18-8
SERIESNE
5
1"
8
Plain
18-8
SERIESNE
5
1/4"
20
YZP
8
SERIESNE
100
5/16"
18
YZP
8
SERIESNE
100
3/8"
16
YZP
8
SERIESNE
50
7/16"
14
YZP
8
SERIESNE
25
1/2"
13
YZP
8
SERIESNE
25
5/8"
11
YZP
8
SERIESNE
10
3/4"
10
YZP
8
SERIESNE
10
7/8"
9
YZP
8
SERIESNE
5
1"
8
YZP
8
SERIESNE
5
1-1/4"
7
YZP
8
SERIESNE
5
1/4"
20
HDG
A
A563
100
5/16"
18
HDG
A
A563
100
3/8"
16
HDG
A
A563
50
1/2"
13
HDG
A
A563
25
5/8"
11
HDG
A
A563
10
3/4"
10
HDG
A
A563
10
7/8"
9
HDG
8
A563
5
1"
8
HDG
A
A563
5
1-1/4"
7
HDG
A
A563
5
1/4"
20
YZP
8
SAEJ995
100
5/16"
18
YZP
8
SAEJ995
100
3/8"
16
YZP
8
SAEJ995
50
7/16"
14
YZP
8
SAEJ995
25
1/2"
13
YZP
8
SAEJ995
25
5/8"
11
YZP
8
SAEJ995
10
3/4"
10
YZP
8
SAEJ995
10
7/8"
9
YZP
8
SAEJ995
5
1"
8
YZP
8
SAEJ995
5
1-1/4"
7
YZP
8
SAEJ995
5
1/4"
20
Plain
18-8
5
Please call
5/16"
18
Plain
18-8
5
3/8"
16
Plain
18-8
5
7/16"
14
Plain
18-8
5
1/2"
13
Plain
18-8
5
5/8"
11
Plain
18-8
5
3/4"
10
Plain
18-8
5
7/8"
9
Plain
18-8
5
1"
8
Plain
18-8
5
1/4"
20
Plain
18-8
100
5/16"
18
Plain
18-8
100
3/8"
16
Plain
18-8
50
1/2"
13
Plain
18-8
50
1/4"
20
Plain
18-8
100
5/16"
18
Plain
18-8
100
3/8"
16
Plain
18-8
50
1.25
BO
NA
1
1/4"
20
ZP
A
A563
100
5/16"
18
ZP
A
A563
100
3/8"
16
ZP
A
A563
50
Please call
7/16"
14
ZP
A
A563
25
1/2"
13
ZP
A
A563
25
5/8"
11
ZP
A
A563
10
3/4"
10
ZP
A
A563
10
7/8"
9
ZP
A
A563
5
1"
8
ZP
A
A563
5
1-1/4"
7
ZP
A
A563
20
3/8"
16
HDG
A
A563
50
Please call
1/2"
13
HDG
A
A563
25
5/8"
11
HDG
A
A563
10
3/4"
10
HDG
A
A563
10
7/8"
9
HDG
A
A563
5
1"
8
HDG
A
A563
5
1-1/4"
7
HDG
A
A563
5
1/2"
13
Plain
C
A563
25
5/8"
11
Plain
C
A563
10
3/4"
10
Plain
C
A563
10
7/8"
9
Plain
C
A563
5
1"
8
Plain
C
A563
5
1/2"
13
HDG
DH
A563
25
5/8"
11
HDG
DH
A563
10
3/4"
10
HDG
DH
A563
10
7/8"
9
HDG
DH
A563
5
1"
8
HDG
DH
A563
5
1-1/4"
7
HDG
DH
A563
5
3/8"
16
YZP
C
50
7/16"
14
YZP
C
25
Please call
1/2"
13
ZP
C
25
5/8"
11
ZP
C
10
3/4"
10
YZP
C
10
7/8"
9
ZP
C
5
1"
8
YZP
C
5
1-1/4"
7
YZP
C
5