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ASME/ANSI B18.17:1968 Square Wing Wing Screw

ASME/ANSI B18.17:1968 Square Wing Wing Screw features a square-wing hand head with clear gripping surfaces, enabling quick tightening and release without the need for tools.

The square wing form is suitable for positions where defined gripping edges are helpful, especially on clamps, removable guards, adjustment plates, and temporary fixing structures. This type of screw improves operating efficiency and reduces tool dependence during maintenance or changeover.

It is suitable for U.S. standard equipment, light machinery, test fixtures, display hardware, and field adjustment devices. Different sizes, materials, and finishes can be supplied to meet requirements for indoor or outdoor use, corrosion resistance, and appearance matching.

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PREV：DIN 316:2016 Wing Screw NEXT：ASME/ANSI B18.17:1968 Type B Standard Thumb Screw

Dimensions unit: inch 

Thread size

4#
Heavy type

6#
Light type

6#
Heavy type

8#
Light type

8#
Heavy type

10#
Light type

10#
Heavy type

12#
Light type

12#
Heavy type

1/4
Light type

1/4
Standard type

1/4
Heavy type

d

0.112

0.138

0.138

0.164

0.164

0.19

0.19

0.216

0.216

0.25

0.25

0.25

PP

40

32

32

32

32

24 & 32

24 & 32

24

24

20

20

20

s

Max.

0.72

0.72

0.91

0.91

1.1

0.91

1.1

1.1

1.25

1.1

1.25

1.44

Min.

0.59

0.59

0.78

0.78

0.97

0.78

0.97

0.97

1.12

0.97

1.12

1.31

H

Max.

0.41

0.41

0.47

0.47

0.57

0.47

0.57

0.57

0.66

0.57

0.66

0.79

Min.

0.28

0.28

0.34

0.34

0.43

0.34

0.43

0.43

0.53

0.43

0.53

0.65

h

Max.

0.11

0.11

0.14

0.14

0.18

0.14

0.18

0.18

0.21

0.18

0.21

0.24

Min.

0.07

0.07

0.1

0.1

0.14

0.1

0.14

0.14

0.17

0.14

0.17

0.2

dk

Max.

0.33

0.33

0.43

0.43

0.5

0.43

0.5

0.5

0.58

0.5

0.58

0.7

Min.

0.29

0.29

0.39

0.39

0.45

0.39

0.45

0.45

0.51

0.45

0.51

0.64

k

Max.

0.14

0.14

0.18

0.18

0.22

0.18

0.22

0.22

0.25

0.22

0.25

0.3

Min.

0.1

0.1

0.14

0.14

0.17

0.14

0.17

0.17

0.2

0.17

0.2

0.26

L

Max.

0.75

0.75

0.75

0.75

0.75

1

1

1

1

1.5

1.5

1.5

Min.

0.25

0.25

0.25

0.38

0.38

0.38

0.38

0.38

0.38

0.5

0.5

0.5

   

Thread size d

5/16
Light type

5/16
Standard type

5/16
Heavy type

3/8
Light type

3/8
Standard type

3/8
Heavy type

7/16
Light type

7/16
Heavy type

1/2
Light type

1/2
Heavy type

5/8
Heavy type

d

0.3125

0.3125

0.3125

0.375

0.375

0.375

0.4375

0.4375

0.5

0.5

0.625

PP

18

18

18

16

16

16

14

14

13

13

11

s

Max.

1.25

1.44

1.94

1.44

1.94

2.76

1.94

2.76

1.94

2.76

2.76

Min.

1.12

1.31

1.81

1.31

1.81

2.62

1.81

2.62

1.81

2.62

2.62

H

Max.

0.66

0.79

1

0.79

1

1.44

1

1.44

1

1.44

1.44

Min.

0.53

0.65

0.87

0.65

0.87

1.31

0.87

1.31

0.87

1.31

1.31

h

Max.

0.21

0.24

0.33

0.24

0.33

0.4

0.33

0.4

0.33

0.4

0.4

Min.

0.17

0.2

0.26

0.2

0.26

0.34

0.26

0.34

0.26

0.34

0.34

dk

Max.

0.58

0.7

0.93

0.7

0.93

1.19

0.93

1.19

0.93

1.19

1.19

Min.

0.51

0.64

0.86

0.64

0.86

1.13

0.86

1.13

0.86

1.13

1.13

k

Max.

0.25

0.3

0.39

0.3

0.39

0.55

0.39

0.55

0.39

0.55

0.55

Min.

0.2

0.26

0.35

0.26

0.35

0.51

0.35

0.51

0.35

0.51

0.51

L

Max.

1.5

1.5

1.5

2

2

2

4

4

4

4

4

Min.

0.5

0.5

0.5

0.75

0.75

0.75

1

1

1

1

1.25

 

 

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