7YRS
HSIANG KAI FU CO., LTD.
886-4-23502590
886-4-23503161
No.9, Jingke 6th Rd., Nantun Dist., Taichung City 408, Taiwan
www.nikki.com.tw

Products

Precision Turning Locknut
MKR Precision Turning Locknut ― Axial Locking
MKR 系列 MKR Series

The setscrews of locknut intersect a 30° angle with radius which drive the locking brass perfectly stuck on the thread flank of shaft.

‧No thrust washer or keyway needed.
‧Easy to assemble and disassemble.
‧Can be re-used if handled properly.
‧The connecting face and thread area are all produced by high precision grinding process.

‧The series locknut flank surface is produced by grinding. The series is specially designed to generate powerful braking capacity due to
deformation of locknut itself, which makes the male and female threads contact tightly together.
‧Locked without lock washer and key way.
‧Easy assembly and disassembly
‧Can be reused if handled correctly.


‧Material:JIS SCM440/DIN42CrMo4/AISI 4140
‧Hardness — HRC 28-32
‧Precision — ISO 4H

Specification

NIKKI Specification Table

TYPE & Pitch Dimensions Helical Angle Screw Torque
D h e d1 d2 d3 d4 c DIN n kg-cm
MKR10 x 0.75P 24 14 6.6 22 17 3.2 2.5 2.5 1.44 M3 x 10 3 20
MKR10 x 1.0P 15 1.95

MKR12 x 1.0P

26

14

25

19

3

1.61

MKR12 x 1.5P

15

2.48

MKR14 x 1.5P

32

16

7.6

30

22.5

4.3

4

3

2.10

M4 x 10

30

MKR15 x 1.0P

33

31

23.5

1.27

MKR16 x 1.5P

34

18

--

--

24.5

5

1.82

M4 x 12

4

MKR17 x 1.0P

35

25.5

1.21

MKR18 x 1.5P

36

18

--

--

26.5

4.3

4

5

1.61

MKR20 x 1.0P

40

30.5

0.94

MKR20 x 1.5P

1.44

MKR22 x 1.5P

1.30

MKR24 x 1.5P

42

18

--

--

32.5

4.3

4

5

1.19

MKR25 x 1.5P

45

20

36.5

5

6.5

1.14

M4 x 14

MKR26 x 1.5P

1.09

MKR28 x 1.5P

46

38.5

1.01

MKR30 x 1.5P

48

20

--

--

40.5

4.3

5

6.5

0.94

MKR32 x 1.5P

50

22

42.5

7

0.88

M4 x 16

MKR35 x 1.5P

53

45.5

0.80

MKR38 x 1.5P

58

48.5

0.74

MKR40 x 1.5P

58

22

--

--

50.5

4.3

5

7

0.70

MKR42 x 1.5P

60

52.5

0.67

MKR45 x 1.5P

68

58

6

6.5

0.62

6

MKR48 x 1.5P

25

59.5

9

0.58

M4 x 18

MKR50 x 1.5P

70

25

--

--

61.5

4.3

6

9

0.56

MKR52 x 1.5P

72

25

--

--

63.5

4.3

6

9

0.54

30

MKR55 x 1.5P

75

66.5

0.51

MKR55 x 2.0P

0.68

MKR58 x 1.5P

82

26

72.5

5.3

0.48

M5 x 18

61

MKR60 x 1.5P

84

74.5

5.3

6

9

0.46

MKR60 x 2.0P

0.62

MKR62 x 1.5P

86

28

76.5

10.5

0.45

M5 x 20

MKR65 x 1.5P

88

78.5

0.43

MKR65 x 2.0P

0.57

MKR68 x 1.5P

95

83

8

9.5

0.41

MKR70 x 1.5P

95

28

--

--

85

5.3

8

9.5

0.40

MKR70 x 2.0P

0.53

MKR72 x 1.5P

98

86

6.4

8.5

0.39

M6 x 20

102

MKR75 x 1.5P

100

88

0.37

MKR75 x 2.0P

0.50

MKR80 x 2.0P

110

32

95

11

0.46

MKR85 x 2.0P

115

32

--

--

100

6.4

8

11

0.44

MKR90 x 2.0P

120

108

0.41

MKR95 x 2.0P

125

113

0.39

MKR100 x 2.0P

130

118

0.37

MKR105 x 2.0P

135

32

--

--

123

6.4

8

11

0.35

MKR110 x 2.0P

140

128

0.34

MKR115 x 2.0P

145

36

133

13

0.32

M6 x 25

MKR120 x 2.0P

155

140

0.31

MKR125 x 2.0P

160

36

--

--

148

6.4

8

13

0.29

MKR130 x 3.0P

165

153

0.43

MKR140 x 3.0P

180

165

10

12

0.40

8

MKR150 x 3.0P

190

175

0.37

MKR160 x 3.0P

205

40

--

--

185

8.4

10

14

0.35

M8 x 30

255

MKR170 x 3.0P

215

195

0.33

MKR180 x 3.0P

230

210

0.31

MKR190 x 3.0P

240

224

0.29

MKR200 x 3.0P

245

229

0.28

mkr

Remark

‧When ordering above products, please refer to the TYPE & Pitch.
‧If left hand thread required, please notify “L” after the TYPE & Pitch. For example: MKR25X1.5P-L
‧If inch thread required, please refer to the TYPE & Pitch. For example: MKR25-U20
‧To prevent the locknuts are in short supply, please send your order in advance.

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