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F series : Flank Locking
Locking Mold : flank 30°
    three-point of cooper screws
    locking
Material : JIS G4105 (SCM440),
   DIN 17204 (42CrMo4)
Hardness : HRC 30 ±2
Thread Tolerance : ISO 4H
Notes : apply for high rigidity
  interchangeable with A series 


           
                             
Precision Locknuts
A series: Axial Locking
C series: Clasp Axial Locking
R series:  Radial Locking



               


 



 


    
           


thread
D
h
d
tn x g/b
t/c
 M
Max. Nm


F M14x1.5
30
14
25
3x4/-
2
-
M5
4.5
F M15x1
2
-
F M16x1.5
2
-
F M17x1
32
16
27
2
-
F M18x1.5
2
-
F M20x1
38
33
2
-
F M20x1.5
2
-
M6
8.0
F M22x1.5
2
-
F M24x1.5
18
3x5/-
2
-
F M25x1.5
2
-
F M27x1.5
40
35
2
-
F M30x1.5
45
40
2
-
F M33x1.5
50
45
2
-
F M35x1.5
52
47
2
-
M8
18.0
F M36x1.5
2
-
F M39x1.5
58
20
52
3x6/-
2.5
-
F M40x1.5
2..5
-
F M42x1.5
62
56
2.5
-
F M45x1.5
65
59
2.5
-
F M48x1.5
70
64
2.5
-
F M50x1.5

2.5

-
F M52x1.5
73
22
68
3x7/Ø6
3
63
F M55x1.5
75
65
F M56x2
65
F M60x2
80
73
70
F M56x2
85
78
75
F M65x2
75
F M68x2
92
24
84
3x8/Ø6
3.5
81
F M70x2
81
F M72x2
94
86
83
F M75x2
98
90
87
F M76x2
87
F M80x2
105
96
3x8/Ø7
93
F M85x2
110
102
6x8/Ø7
98
F M90x2
120
26
108
6x10/Ø7
4
105
F M95x2
125
113
110
F M100x2
130
26
118
6x10/Ø7
4
115
MB
18.0
F M105x2
140
28
125
123
M10
35.0
F M110x2
145
132
128
F M115x2
150
137
133
F M120x2
155
30
142
6x12/Ø7
5
138
F M125x2
160
147
143
F M130x2
165
152
148
F M135x2
175
32
160
155
F M140x2
180
165
160
F M145x2
190
175
168
F M150x2
195
180
173
F M155x3
200
34
180
6x14/Ø8
6
178
F M160x3
210
190
185
F M165x3
210
190
188
F M170x3
220
200
195
F M180x3
230
36
205
6x16/Ø8
7
205
M12
60.0
F M190x3
240
215
215
F M200x3
250
38
225
225
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