ANSI Inch Size Wing Nut Specification Chart Type A

ANSI Hardware Design & Engineering

Wing Dimensional Data per. ANSI B18.17 - Wing nut is a nut having wings designed for easy manual turning without driver or wrench.

ANSI B18.17 wing nuts are classified first, by type on the basis of the method of manufacture; and second, by style on the basis of design characteristics.

Type A wing nuts are cold forged or cold formed solid nuts having wings of moderate height. In some sizes they are produced in regular, light, and heavy series to best suit the requirements of specific applications.

ANSI Wing Nut

Notes: LGT = Light, Hvy = Heavy, Reg. = Regular. Sizes shown as bold are design preferred.

All dimensional data is in inches. 

Size
Thds
per
Inch
Series
A
B
C
D
E
G
Wing Spread
Wing Height
Wing Thick.
Between Wings
Boss Dia.
Boss Height
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
3
(0.0990)
48,
56
Hvy.
0.72
0.59
0.41
0.28
0.11
0.07
0.21
0.17
0.33
0.29
0.14
0.10
4
(0.1120)
40,
38
Hvy.
0.72
0.59
0.41
0.28
0.11
0.07
0.21
0.17
0.33
0.29
0.14
0.10
5
(0.1250)
40,
44
Lgt.
0.72
0.59
0.41
0.28
0.11
0.07
0.21
0.17
0.33
0.29
0.14
0.10
Hvy.
0.91
0.78
0.47
0.34
0.14
0.10
0.27
0.22
0.43
0.39
0.18
0.14
6
(0.1380)
32,
40
Lgt.
0.72
0.59
0.41
0.28
0.11
0.07
0.21
0.17
0.33
0.29
0.14
0.10
Hvy.
0.91
0.78
0.47
0.34
0.14
0.10
0.27
0.22
0.43
0.39
0.18
0.14
8
(0.1640)
32,
36
Lgt.
0.91
0.78
0.47
0.34
0.14
0.10
0.27
0.22
0.43
0.39
0.18
0.14
Hvy.
1.10
0.97
0.57
0.43
0.18
0.14
0.33
0.26
0.50
0.45
0.22
0.17
10
(0.1900)
24,
32
Lgt.
0.91
0.78
0.47
0.34
0.14
0.10
0.27
0.22
0.43
0.39
0.18
0.14
Hvy.
1.10
0.97
0.57
0.43
0.18
0.14
0.33
0.26
0.50
0.45
0.22
0.17
12
(0.2160)
24,
28
Lgt.
1.10
0.97
0.57
0.43
0.18
0.14
0.33
0.26
0.50
0.45
0.22
0.17
Hvy.
1.25
1.12
0.66
0.53
0.21
0.17
0.39
0.32
0.58
0.51
0.25
0.20
1/4
(0.2500)
20,
28
Lgt.
1.10
0.97
0.57
0.43
0.18
0.14
0.39
0.26
0.50
0.45
0.22
0.17
Reg.
1.25
1.12
0.66
0.53
0.21
0.17
0.39
0.32
0.58
0.51
0.25
0.20
Hvy.
1.44
1.31
0.79
0.65
0.24
0.20
0.48
0.42
0.70
0.64
0.30
0.26
5/16
(0.3125)
18,
24
Lgt.
1.25
1.12
0.66
0.53
0.21
0.17
0.39
0.32
0.58
0.51
0.25
0.20
Reg.
1.44
1.31
0.79
0.65
0.24
0.20
0.48
0.42
0.70
0.64
0.30
0.26
Hvy.
1.94
1.81
1.00
0.87
0.33
0.26
0.65
0.54
0.93
0.86
0.39
0.35
3/8
(0.3750)
16,
24
Lgt.
1.44
1.31
0.79
0.65
0.24
0.20
0.48
0.42
0.70
0.64
0.30
0.26
Reg.
1.94
1.81
1.00
0.87
0.33
0.26
0.65
0.54
0.93
0.86
0.39
0.35
7/16
(0.4375)
14,
20
Lgt.
1.94
1.81
1.00
0.87
0.33
0.26
0.65
0.54
0.93
0.86
0.39
0.35
Hvy.
2.76
2.62
1.44
1.31
0.40
0.34
0.90
0.80
1.19
1.13
0.55
0.51
1/2
(0.5000)
13,
20
Lgt.
1.94
1.81
1.00
0.87
0.33
0.26
0.65
0.54
0.93
0.86
0.39
0.35
Hvy.
2.76
2.62
1.44
1.31
0.40
0.34
0.90
0.80
1.19
1.13
0.55
0.51
9/16
(0.5625)
12,
18
Hvy.
2.76
2.62
1.44
1.31
0.40
0.34
0.90
0.80
1.19
1.13
0.55
0.51
5/8
(0.6250)
11,
18
Hvy.
2.76
2.62
1.44
1.31
0.40
0.34
0.90
0.80
1.19
1.13
0.55
0.51
3/4
(0.7500)
10,
16
Hvy.
2.76
2.62
1.44
1.31
0.40
0.34
0.90
0.80
1.19
1.13
0.55
0.51

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