Machinery's Handbook, 31st Edition
WING NUTS, WING SCREWS AND THUMB SCREWS
1925
WING NUTS, WING SCREWS, AND THUMB SCREWS Wing Nuts.— A wing nut is a nut having wings designed for manual turning without driver or wrench. As covered by ANSI/ASME B18.17-1968 (Withdrawn) wing nuts are classified first, by type on the basis of the method of manufacture; and second, by style on the basis of design characteristics. They consist of: Type A: 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. Dimensions are given in Table 1. Table 1. American National Standard Type A Wing Nuts ANSI/ASME B18.17-1968 (Withdrawn) E B C G
A D
Nominal Size or Basic Major Diameter of Thread a 3 (0.0990) 4 (0.1120) 5 (0.1250)
A
B
C
D
E
G
Nut Blank Size (Ref)
Wing Spread Boss Height Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Wing Height Wing Thick. Between Wings Boss Dia. AA 0.72 0.59 0.41 0.28 0.11 0.07 0.21 0.17 0.33 0.29 0.14 0.10 AA 0.72 0.59 0.41 0.28 0.11 0.07 0.21 0.17 0.33 0.29 0.14 0.10 AA 0.72 0.59 0.41 0.28 0.11 0.07 0.21 0.17 0.33 0.29 0.14 0.10 A 0.91 0.78 0.47 0.34 0.14 0.10 0.27 0.22 0.43 0.39 0.18 0.14 AA 0.72 0.59 0.41 0.28 0.11 0.07 0.21 0.17 0.33 0.29 0.14 0.10 A 0.91 0.78 0.47 0.34 0.14 0.10 0.27 0.22 0.43 0.39 0.18 0.14 A 0.91 0.78 0.47 0.34 0.14 0.10 0.27 0.22 0.43 0.39 0.18 0.14 B 1.10 0.97 0.57 0.43 0.18 0.14 0.33 0.26 0.50 0.45 0.22 0.17 A 0.91 0.78 0.47 0.34 0.14 0.10 0.27 0.22 0.43 0.39 0.18 0.14 B 1.10 0.97 0.57 0.43 0.18 0.14 0.33 0.26 0.50 0.45 0.22 0.17 B 1.10 0.97 0.57 0.43 0.18 0.14 0.33 0.26 0.50 0.45 0.22 0.17 C 1.25 1.12 0.66 0.53 0.21 0.17 0.39 0.32 0.58 0.51 0.25 0.20 B 1.10 0.97 0.57 0.43 0.18 0.14 0.39 0.26 0.50 0.45 0.22 0.17 C 1.25 1.12 0.66 0.53 0.21 0.17 0.39 0.32 0.58 0.51 0.25 0.20 D 1.44 1.31 0.79 0.65 0.24 0.20 0.48 0.42 0.70 0.64 0.30 0.26 C 1.25 1.12 0.66 0.53 0.21 0.17 0.39 0.32 0.58 0.51 0.25 0.20 D 1.44 1.31 0.79 0.65 0.24 0.20 0.48 0.42 0.70 0.64 0.30 0.26 E 1.94 1.81 1.00 0.87 0.33 0.26 0.65 0.54 0.93 0.86 0.39 0.35 D 1.44 1.31 0.79 0.65 0.24 0.20 0.48 0.42 0.70 0.64 0.30 0.26 E 1.94 1.81 1.00 0.87 0.33 0.26 0.65 0.54 0.93 0.86 0.39 0.35 E 1.94 1.81 1.00 0.87 0.33 0.26 0.65 0.54 0.93 0.86 0.39 0.35 F 2.76 2.62 1.44 1.31 0.40 0.34 0.90 0.80 1.19 1.13 0.55 0.51 E 1.94 1.81 1.00 0.87 0.33 0.26 0.65 0.54 0.93 0.86 0.39 0.35 F 2.76 2.62 1.44 1.31 0.40 0.34 0.90 0.80 1.19 1.13 0.55 0.51 F 2.76 2.62 1.44 1.31 0.40 0.34 0.90 0.80 1.19 1.13 0.55 0.51 F 2.76 2.62 1.44 1.31 0.40 0.34 0.90 0.80 1.19 1.13 0.55 0.51 F 2.76 2.62 1.44 1.31 0.40 0.34 0.90 0.80 1.19 1.13 0.55 0.51
Thds. per Inch Series b
48, 56 40, 38 40, 44
Hvy. Hvy. Lgt. Hvy. Hvy. Lgt. Hvy. Lgt. Hvy. Lgt. Hvy. Lgt. Reg. Hvy. Lgt. Reg. Hvy. Lgt. Reg. Lgt. Hvy. Lgt. Hvy. Hvy. Hvy. Hvy.
6 (0.1380)
32, 40 Lgt.
8 (0.1640)
32, 36
10 (0.1900)
24, 32
12 (0.2160)
24, 28
(0.2500)
20, 28
1 ∕ 4
5 ∕ 16 (0.3125)
18, 24
(0.3750)
16, 24
3 ∕ 8
7 ∕ 16 (0.4375)
14, 20
(0.5000)
13, 20 12, 18 11, 18 10, 16
1 ∕ 2
9 ∕ 16 (0.5625)
(0.6250) (0.7500)
5 ∕ 8 3 ∕ 4
a Where specifying nominal size in decimals, zeros in the fourth decimal place are omitted. b Lgt. = Light; Hvy. = Heavy; Reg. = Regular. Sizes shown in bold face are preferred. All dimensions in inches.
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