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R series : Radial Locking
Locking Mold : radial (vertical)
    three-point of cooper screws
    locking
Material : JIS G4105 (SCM440),
   DIN 17204 (42CrMo4)
Hardness : HRC 30 ±2
Thread Tolerance : ISO 4H
Notes : apply for limit space  
   


           
                             
Precision Locknuts
A series: Axial Locking
C series: Clasp Axial Locking
F series:  Flank Locking
   



               


 



 


    
           


thread
D
h
g
t
d
n- M
Max. Nm


R M6x0.5
16
8
3
2
11
2-M4
3.5
R M8x0.75
R M10x0.75
18
13
R M10x1
R M12x1
20
16
R M12x1.25
R M14x1.5
25
21
R M15x1
R M16x1.5
28
10
4
23
2-M5
4.5
R M17x1
R M18x1.5
30
25
R M20x1
32
27
3-M5
R M20x1.5
R M22x1.5
35
30
R M24x1.5
38
12
5
33
3-M6
8.0
R M25x1.5
R M27x1.5
42
37
R M30x1.5
45
40
R M33x1.5
52
45
R M35x1.5
47
R M36x1.5
55
14
6
2.5
49
R M39x1.5
58
52
R M40x1.5
R M42x1.5
62
56
R M45x1.5
65
59
R M48x1.5
68
62
R M50x1.5
70
64
R M52x1.5
73
16
7
3
66
3-M8
18.0
R M55x2
75
68
R M56x2
77
70
R M60x2
80
73
R M64x2
85
78
R M65x2
R M68x2
92
18
8
3.5
84
R M70x2
R M72x2
95
86
R M75x2
98
90
R M76x2
100
92
R M80x2
105
96
R M85x2
110
102
R M90x2
120
20
10
4
108
R M95x2
125
113
R M100x2
130
118
R M105x2
140
22
12
5
125
R M110x2
145
132
R M115x2
150
137
R M120x2
155
24
142
R M125x2
160
147
R M130x2
165
152
R M135x2
175
26
14
6
160
3-M10
35.0
R M140x2
180
165
R M145x2
190
175
R M150x2
195
180
R M155x3
200
28
16
7
180
R M160x3
210
190
R M165x3
210
190
R M170x3
220
200
R M180x3
230
30
18
8
205
3-M12
60.0
R M190x3
240
215
R M200x3
250
32
225
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