socket head cap screws
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SOCKET HEAD CAP SCREWS

Roll-Fast is the leading supplier of Socket Head Cap screw to many industries. According to ISO 4762 or as per customer requirement.

Socket cap screws are machine flanges with a cylindrical barrel shaped head containing a hexagonal hole. The head has a smaller diameter than most other machine screw heads, typically just 1.5 times the nominal thread diameter.

Socket head cap screws are special types of fasteners / Bolts typically used in machine parts, die fixturing, clamping etc.

We offer various coatings and colours according to the specification and need of the customer. We provide Self-finish or natural finish, Zinc plated, yellow finished, blue finished, black finished bolts, Hot Dip Galvanized (HDG), Geomat etc.

Types of Cap Screws we are Manufacturing

img Socket Head Cap Screw

A socket head cap screws are machine screws with a cylindrical barrel shaped head containing a hexagonal socket. The head has a smaller diameter than most other machine screw heads, typically just 1.5 times the nominal thread diameter.

img Low Head Cap Screw

Low head cap screws are same as socket head cap screws that feature a head containing a hexagonal socket. The socket head makes it easy to securely install the screws with hex keys or hex socket bits, while their low head makes them suitable for installation in situations where there is limited clearance.

img Flat Head Cap Screw

The Flat head screws have a large head and a cylindrical shaft with external threads. The head has a larger diameter than the threaded portion, this provides a positive mechanical stop when tightening the screw. Cap screws are tightened directly into a threaded or tapped hole, usually without a nut.

img Button Head Cap Screw

The Button head cap screws have a low domed type head with a wider bearing surface than standard heads. Designed for light fastening applications, button head cap screws lack the strength of standard socket screws.

img Socket Shoulder Screw

This socket shoulder screw, often called a “stripper bolt”, is used for a wide range of punch and die operations. The shoulder screws are commonly used as fulcrums or pivots in machine designs that involve links, levers or other oscillating parts.

Dimension of Socket head cap Screw As per DIN 912 / ISO 4762

img

d - the nominal diameter of the thread
k - head height
t - groove depth
dk - head diameter
L - length of bolt
s - size of the internal hexagon

Thread d

M1,6

M2

M2,5

M3

M4

M5

M6

M8

M10

M12

(M14)

M16

M20

M24

M30

M36

M42

M48

M56

M64

P

0,35

0,4

0,45

0,5

0,7

0,8

1

1,25

1,5

1,75

2

2

2,5

3

3,5

4

4,5

5

5,5

6

b

15

16

17

18

20

22

24

28

32

36

40

44

52

60

72

84

96

108

124

140

dk

max.

3,00

3,80

4,50

5.50

7,00

8,50

10.00

13,00

16,00

18,00

21,00

24,00

30,00

36,00

45,00

54,00

63,00

72,00

84,00

96,00

max. for grooved head

3,14

3,98

4,68

5.68

7,22

8,72

10,22

13,27

16,27

18,27

21,33

24,33

30,33

36,39

45,39

54,46

63,46

72,46

84,54

96,54

min.

2,86

3,62

4,32

5,32

6,78

8,28

9,78

12,73

15,73

17,73

20,67

23,67

29,67

35,61

44,61

53,54

62,54

71,54

83,46

95,46

da

max.

2

2,6

3,1

3,6

4,7

5,7

6,8

9,2

11,2

13,7

15,7

17,7

22,4

26,4

33,4

39,4

45,6

52,6

63

71

ds

max.

1,60

2,00

2,50

3,00

4,00

5,00

6,00

8,00

10,00

12,00

14,00

16.00

20,00

24,00

30,00

36,00

42,00

48,00

56,00

64,00

min.

1,46

1,86

2,36

2,86

3,82

4,82

5,82

7,78

9,78

11,73

13,73

15,73

19,67

23,67

29,67

35,61

41,61

47,61

55,54

63,54

e

min.

1,733

1,733

2,303

2,873

3,443

4,583

5,723

6,863

9,149

11,429

13,716

15,996

19,437

21,734

25,154

30,854

36,571

41,131

46,831

52,531

h

max.

0,34

0,51

0,51

0,51

0,6

0,6

0,68

1,02

1,02

1,45

1,45

1,45

2,04

2,04

2,89

2,89

3,06

3,91

5,95

5,95

k

max.

1,60

2,00

2,50

3,00

4,00

5,00

6,0

8,00

10,00

12,00

14,00

16,00

20,00

24,00

30,00

36,00

42,00

48,00

56,00

64,00

min.

1,46

1,86

2,36

2,86

3,82

4,82

5,7

7,64

9,64

11,57

13,57

15,57

19,48

23,48

29,48

35,38

41,38

47,38

55,26

63,26

r

min.

0,1

0,1

0,1

0,1

0,2

0,2

0,25

0,4

0,4

0,6

0,6

0,6

0,8

0,8

1

1

1,2

1,6

2

2

s

nominal

1,5

1,5

2

2,5

3

4

5

6

8

10

12

14

17

19

22

27

32

36

41

46

max.

1,58

1,58

2,08

2,58

3,08

4,095

5,14

6,14

8,175

10,175

12,212

14,212

17,23

19,275

22,275

27,275

32,33

36,33

41,33

46,33

min.

1,52

1,52

2,02

2,52

3,02

4,020

5.02

6,02

8,025

10,025

12,032

14,032

17,05

19,065

22,065

27,065

32,08

36,08

41,08

46,08

t

min.

0,7

1

1,1

1,3

2

2,5

3

4

5

6

7

8

10

12

15,5

19

24

28

34

38

v

max.

0,16

0,2

0,25

0,3

0,4

0,5

0,6

0.8

1

1,2

1,4

1,6

2

2,4

3

3,6

4,2

4,8

5,6

6,4

dw

min.

2,72

3,48

4,18

5,07

6,53

8,03

9,38

12,33

15,33

17,23

20,17

23,17

28,87

34,81

43,61

52,54

61,34

70,34

82,26

94,26

w

min.

0,55

0,55

0,85

1,15

1,4

1,9

2,3

3,3

4

4,8

5,8

6,8

8,6

10,4

13,1

15,3

16,3

17,5

19

22

Thread d

M1,6

M2

M2,5

M3

M4

M5

M6

M8

M10

M12

l

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

nominal

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

2,5

2,3

2,7

full thread

3

2,8

3,2

full thread

4

3,76

4,24

full thread

5

4,76

5,24

full thread

6

5,76

6,24

full thread

8

7,71

8,29

full thread

10

9,71

10,29

full thread

12

11,65

12,35

full thread

16

15,65

16,35

full thread

20

19,58

20,42

   

2

4

full thread

25

24,58

25,42

       

5,75

8

4,5

7

full thread

30

29,58

30,42

           

9,5

12

6,5

10

4

8

full thread

35

34,5

35,5

               

11,5

15

9

13

6

11

full thread

40

39,5

40,5

               

16,5

20

14

18

11

16

5,75

12

full thread

45

44,5

45,5

                   

19

23

16

21

10,75

17

5,5

13

full thread

50

49,5

50,5

                   

24

28

21

26

15,75

22

10,5

18

55

54,4

55,6

                       

26

31

20,75

27

15,5

23

10,25

19

60

59,4

60,6

                       

31

36

25,75

32

20,5

28

15,25

24

65

64,4

65,6

                           

30,75

37

25,5

33

20,25

29

70

69,4

70,6

                           

35,75

42

30,5

38

25,25

34

80

79,4

80,6

                           

45,75

52

40,5

48

35,25

44

90

89,3

90,7

                               

50,5

58

45,25

54

100

99,3

100,7

                               

60,5

68

55,25

64

110

109,3

110,7

                                   

65,25

74

120

119,3

120,7

                                   

75,25

84

130

129,2

130,8

                                       

140

139,2

140,8

                                       

150

149,2

150,8

                                       

160

159,2

160,8

                                       

180

179,2

180,8

                                       

200

199,07

200,92

                                       

220

219,07

220,92

                                       

240

239,07

240,92

                                       

260

258,95

261,05

                                       

280

278,95

281,05

                                       

300

298,95

301,05

                                       

thread d

(M14)

M16

M20

M24

M30

M36

M42

M48

M56

M64

l

   

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

ls

lg

nominal

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

16

15,65

16,35

                                       

20

19,58

20,42

full thread

                                   

25

24,58

25,42

full thread

full thread

                               

30

29,58

30,42

full thread

full thread

full thread

                           

35

34,5

35,5

full thread

full thread

full thread

full thread

                       

40

39,5

40,5

full thread

full thread

full thread

full thread

                       

45

44,5

45,5

full thread

full thread

full thread

full thread

full thread

                   

50

49,5

50,5

full thread

full thread

full thread

full thread

full thread

                   

55

54,4

55,6

full thread

full thread

full thread

full thread

full thread

full thread

               

60

59,4

60,6

10

20

full thread

full thread

full thread

full thread

full thread

full thread

           

65

64,4

65,6

15

25

11

21

full thread

full thread

full thread

full thread

full thread

           

70

69,4

70,6

20

30

16

26

full thread

full thread

full thread

full thread

full thread

full thread

       

80

79,4

80,6

30

40

26

36

15,5

28

full thread

full thread

full thread

full thread

full thread

full thread

   

90

89,3

90,7

40

50

36

46

25,5

38

15

30

full thread

full thread

full thread

full thread

full thread

full thread

100

99,3

100,7

50

60

46

56

35,5

48

25

40

full thread

full thread

full thread

full thread

full thread

full thread

110

109,3

110,7

60

70

56

66

45,5

58

35

50

20,5

38

full thread

full thread

full thread

full thread

full thread

120

119,3

120,7

70

80

66

76

55,5

68

45

60

30,5

48

16

36

full thread

full thread

full thread

full thread

130

129,2

130,8

80

90

76

86

65,5

78

55

70

40,5

58

26

46

full thread

full thread

full thread

full thread

140

139,2

140,8

90

100

86

96

75,5

88

65

80

50,5

68

36

56

21,5

44

full thread

full thread

full thread

150

149,2

150,8

   

96

106

85,5

98

75

90

60,5

78

46

66

31,5

54

full thread

full thread

full thread

160

159,2

160,8

   

106

116

95,5

108

85

100

70,5

88

56

76

41,5

64

27

52

full thread

full thread

180

179,2

180,8

       

115,5

128

105

120

90,5

108

76

96

61,5

84

47

72

28,5

56

full thread

200

199,075

200,925

       

135,5

148

125

140

110,5

128

96

116

81,5

104

67

92

48,5

76

30

60

220

219,075

220,925

                       

101,5

124

87

112

68,5

96

50

80

240

239,075

240,925

                       

121,5

155

107

132

88,5

116

70

100

260

258,95

261,05

                       

141,5

164

127

152

108,5

136

90

120

280

278,95

281,05

                       

161,5

184

147

172

128,5

156

110

140

300

298,95

301,05

                       

181,5

204

167

192

148,5

176

130

160

Specification

Industries Served

Renewable

Chimney cleaning

Automation

Water Projects

Ship building

Automobiles

Doors

Agricultural equipment & machines

Bridge construction

Hydraulic & Pneumatic

Aluminum frame construction

Parts for Ship engines / Ship Building

HVAC

Wind Turbines

Railways

Petrochemical Industries

Fastening Solutions

Aerospace

Building construction

Dams

Engine parts manufacture

Solar projects

Replacement market

Tunnel Industry

Transmission Industry

Trailer parts

Mining

Raw Materials (Metals)

Alloy Steels

Carbon Steel

Aluminum

Brass

Stainless Steel
Tin
Titanium
Nickel

Silicone Bronze

Duplex Steel

Mild Steel

Standard

ISO

IS

BS

ASME

ASTM

ANSI

DIN

Dast

Heat Treatment

Annealing

Normalizing

Hardening

Stress relieving.

Tempering.

Carburization

Heat Treated to any custom Specification

Fastener Types

Bolts & Studs

Nuts

Washer

Grades

4.6

8.8

10.9

12.9

B7

L7

B8M

SS 304

SS 316

SS 316L

SS 316 S31 etc.

 

4

8

10

12

2H

2HM

8A

8M

8MA etc.

 

 

MS

Carbon Steel

HV 100

HV 200

HV 300

A4

SS etc.

Thread

Metric

UNC

UNF

Diameter

M12-M100

½’ to 4”

 

Finish

Brass

Bronze

Chrome

Nickel-Plated

Zinc Electroplated

Electro galvanizing

Hot Dip Galvanizing

Ceramic Coating

Xylan or Teflon Coating

PTFE Coating

Geomat etc.