NIKKI PRECISION LOCKNUT
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Best Flank Angle Locking Series
HKF Locknuts
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Best Flank Angle Locking Series
HKR Locknuts
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HKR
- Best Flank Angle Locking Series
Outperform 30° Flank Locking Nuts
Thanks to NIKKI's design patent, the difference between the locking torque and the surface pressure of the Best Flank Angle Locking Series locknuts stays within 10%. This series effectively prevents the systems from overheating, loosening, and making noises. The locking stability enables customers to achieve higher product performance.
No thrust washer or keyway needed
Easy to assemble and disassemble
Reusable if handled properly
The contact surface and thread area are all produced by a
high-precision grinding process
.
Material: JIS SCM440 / DIN42CrMo4
Hardness: HRC 28-32
Precision: ISO 4H
Maximum axial run-out: 0.002 mm
HKR Product Specification
Name
Dimensions in mm
Set Screw Data
d0_ISO 4H
D
h
d
n
g
t
n-M
Max. Torque_Nm
HKR15X1.0P
M15X1
25
8
21
3
3
2
3-M4
2.2
HKR17X1.0P
M17X1
28
10
23
3
4
2
3-M5
4.8
HKR20X1.0P
M20X1
32
10
27
3
4
2
3-M5
4.8
HKR20X1.5P
M20X1.5
32
10
27
3
4
2
3-M5
4.8
HKR25X1.5P
M25X1.5
38
12
33
3
5
2
3-M6
8
HKR30X1.5P
M30X1.5
45
12
40
3
5
2
3-M6
8
HKR35X1.5P
M35X1.5
52
12
47
3
5
2
3-M6
8
HKR40X1.5P
M40X1.5
58
14
52
3
6
2.5
3-M6
8
HKR45X1.5P
M45X1.5
65
14
59
3
6
2.5
3-M6
8
HKR50X1.5P
M50X1.5
70
14
64
3
6
2.5
3-M6
8
HKR55X1.5P
M55X1.5
75
16
68
3
7
3
3-M8
19
HKR55X2.0P
M55X2
75
16
68
3
7
3
3-M8
19
HKR60X1.5P
M60X1.5
80
16
73
3
7
3
3-M8
19
HKR60X2.0P
M60X2
80
16
73
3
7
3
3-M8
19
HKR65X1.5P
M65X1.5
85
16
78
3
7
3
3-M8
19
HKR65X2.0P
M65X2
85
16
78
3
7
3
3-M8
19
HKR70X1.5P
M70X1.5
92
18
84
3
8
3.5
3-M8
19
HKR70X2.0P
M70X2
92
18
84
3
8
3.5
3-M8
19
HKR75X1.5P
M75X1.5
98
18
90
3
8
3.5
3-M8
19
HKR75X2.0P
M75X2
98
18
90
3
8
3.5
3-M8
19
HKR80X2.0P
M80X2
105
18
96
3
8
3.5
3-M8
19
HKR85X2.0P
M85X2
110
18
102
6
8
3.5
6-M8
19
HKR90X2.0P
M90X2
120
20
108
6
10
4
6-M8
19
HKR95X2.0P
M95X2
125
20
113
6
10
4
6-M8
19
HKR100X2.0P
M100X2
130
20
118
6
10
4
6-M8
19
HKR105X2.0P
M105X2
140
22
125
6
10
4
6-M10
36
HKR110X2.0P
M110X2
145
22
132
6
10
4
6-M10
36
HKR115X2.0P
M115X2
150
22
137
6
10
4
6-M10
36
HKR120X2.0P
M120X2
155
24
142
6
12
5
6-M10
36
HKR125X2.0P
M125X2
160
24
147
6
12
5
6-M10
36
HKR130X2.0P
M130X2
165
24
152
6
12
5
6-M10
36
HKR135X2.0P
M135X2
175
26
160
6
12
5
6-M10
36
HKR140X2.0P
M140X2
180
26
165
6
12
5
6-M10
36
HKR145X2.0P
M145X2
190
26
175
6
12
5
6-M10
36
HKR150X2.0P
M150X2
195
26
180
6
12
5
6-M10
36
HKR155X3.0P
M155X3
200
28
180
6
14
6
6-M10
36
HKR160X3.0P
M160X3
210
28
190
6
14
6
6-M10
36
HKR165X3.0P
M165X3
210
28
190
6
14
6
6-M10
36
HKR170X3.0P
M170X3
220
28
200
6
14
6
6-M10
36
HKR180X3.0P
M180X3
230
30
205
6
16
7
6-M12
60
HKR190X3.0P
M190X3
240
30
215
6
16
7
6-M12
60
HKR200X3.0P
M200X3
250
32
225
6
16
7
6-M12
60
Remark
When ordering above products, please refer to the Name. For example: HKR30x1.5P
If a left-hand thread is required, please notify “L” after the Name. For example: HKR30x1.5P-L
If an inch thread is required, please notify “U” after the Name. For example: HKR30-U18
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